第 1 章系统基本描述； -...

EDPF-NT

Distributed Control System

EDPF-NT Distributed Control System

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Contents

CHAPTER I OUTLINE OF EDPF-NT DISTRIBUTED CONTROL SYSTEM .......................................... 1

1.1. DEVELOPMENT HISTORY OF EDPF-NT .................................................................................................... 1 1.2 PRIMARY STANDARDS AND CODES OF SYSTEM .......................................................................................... 2 1.3 MAIN TECHNICAL FEATURES OF EDPF-NT ................................................................................................ 3 1.4 MAIN PERFORMANCE INDEX OF EDPF-NT ................................................................................................ 7 1.5 SEVERE QUALITY ASSURANCE MEASURE ................................................................................................... 8

CHAPTER II STRUCTURE AND BASIC FRAME OF EDPF-NT ........................................................... 10

2.1 STRUCTURE OF EDPF-NT ....................................................................................................................... 10 2.2 LAYERED MULTI-DOMAIN NETWORK COMMUNICATION SYSTEM ............................................................... 11 2.3 DISTRIBUTED PROCESS CONTROL STATION (DPU) ................................................................................. 12 2.4 ENGINEER STATION (ENG)....................................................................................................................... 13 2.5 OPERATOR STATION (OPR) ..................................................................................................................... 13 2.6 HISTORY DATA RECORDING STATION (HSR) ............................................................................................ 14 2.7 REPORT STATION (LOG) .......................................................................................................................... 14 2.8 PERFORMANCE COMPUTER STATION (CAC) ............................................................................................ 14 2.9 MULTI-FUNCTION INTERFACE WORKSTATION (GATEWAY) .................................................................... 14

CHAPTER III NETWORK INFORMATION TECHNOLOGY AND SAFETY MANAGEMENT AND

CONTROL PLATFORM OF MASSIVE WHOLE STATION INTEGRATED CONTROL SYSTEM ...... 15

3.1 NETWORK INFORMATION TECHNOLOGY OF MASSIVE WHOLE STATION INTEGRATED SYSTEM ................. 15 3.2 SAFETY MANAGEMENT AND CONTROL PLATFORM .................................................................................... 18

CHAPTER IV MONITORING AND OPERATING SOFTWARE OF EDPF-NT ..................................... 20

4.1 MULTI-WINDOW DISPLAY MODE ................................................................................................................ 21 4.2 TREND DISPLAY AND GROUP DISPLAY ...................................................................................................... 23 4.3 PROCESSING ALARM INFORMATION .......................................................................................................... 24 4.4 PNTBROWSER ........................................................................................................................................... 25 4.5 ALGORITHM BROWSER .............................................................................................................................. 27 4.6 HISTORY TREND BROWSER ....................................................................................................................... 28

CHAPTER V ENGINEER STATION SOFTWARE OF EDPF-NT ........................................................... 29

5.1 PROJECT ORGANIZER (PO) INTEGRATING DEVELOPMENT STYLE ........................................................... 29 5.2 GRAPHIC CONTROL CONFIGURATOR ........................................................................................................ 30

CHAPTER VI STORAGE AND RETRIEVAL OF HISTORY DATA, ALARM INFORMATION AND

EVENT INFORMATION ................................................................................................................................... 33

CHAPTER VII REPORT FUNCTION .......................................................................................................... 34

CHAPTER VIII LAYERED COMPREHENSIVE ON-LINE SELF-DIAGNOSTICS ............................... 35

CHAPTER IX DISTRIBUTED PROCESS CONTROL STATION (DPU) ............................................... 36

9.1 DPU CONTROLLER ................................................................................................................................... 36 9.2 SMART I/O MODULES ................................................................................................................................ 39

CHAPTER X FIELDBUS TECHNOLOGY OF EDPF-NT ......................................................................... 65

10.1 TECHNICAL POINTS OF EDPF-NT FIELDBUS ......................................................................................... 65 10.2 FIELDBUS ACCESS PLAN OF EDPF-NT SYSTEM .................................................................................... 65 10.3 PROFIBUS FIELDBUS ACCESS SCHEMES ............................................................................................. 67 10.4 EDPF-NT FIELDBUS EQUIPMENT MANAGEMENT SOFTWARE ................................................................ 69 10.5 SUMMARY ............................................................................................................................................... 73

CHAPTER XI OTHER PRINCIPAL HARDWARE UNITS OF EDPF-NT ................................................. 74


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11.1 INDUSTRIAL NETWORK SWITCH .............................................................................................................. 74 11.2 EDPF-NT EXCLUSIVE POWER SUPPLY QUICK SWITCH DEVICE ............................................................. 75 11.3 EXCLUSIVE DC POWER SUPPLY ............................................................................................................. 77

CHAPTER XII EDPF-NT TYPE DEH SYSTEM ........................................................................................... 78

12.1 DCS-INTEGRATED DEH ........................................................................................................................ 78 12.2 TECHNICAL REQUIREMENTS OF EDPF-DEH CONTROL SYSTEM .......................................................... 78 12.3 EDPF-NT SYSTEM SPEED MEASUREMENT CARD .................................................................................. 79 12.4 ABOUT EDPF-NT SYSTEM VALVE CONTROL CARD ............................................................................... 80 12.5 1000 MW ULTRA-SUPER-CRITICAL STEAM-TURBINE ELECTROHYRAULIC CONTROL SYSTEM .............. 80

CHAPTER XIII DCS MONITORING SOFTWARE BASED ON WEB TECHNOLOGY ......................... 81

CHAPTER XIV EDPF-CP INDUSTRIAL AUTOMATION SYSTEM ......................................................... 83

CHAPTER XV TYPICAL ACHIEVEMENTS OF EDPF-NT ........................................................................ 85

15.1 2×1000MW ULTRA-SUPER-CRITICAL UNITS OF GUODIAN JIANBI POWER STATION ............................ 86 15.2 2×1000MW ULTRA-SUPER-CRITICAL UNITS OF GUOHUA XUZHOU POWER STATION .......................... 86 15.3 2×1000MW ULTRA-SUPER-CRITICAL UNITS OF GUODIAN HANCHUAN POWER STATION .................... 86 15.4 2×1000MW ULTRA-SUPER-CRITICAL SECONDARY REHEAT UNITS OF GUODIAN TAIZHOU POWER

STATION .......................................................................................................................................................... 87 15.5 600 MW SUPER-CRITICAL CYCLE FLUIDIZED-BED GENERATING UNITS OF SICHUAN BAIMA POWER

STATION .......................................................................................................................................................... 87 15.6 2×660MW ULTRA-SUPER-CRITICAL UNITS OF GUODIAN BULIAN POWER STATION ............................. 88


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Chapter I Outline of EDPF-NT Distributed Control System

EDPF-NT is an industrial automation product incorporating computer, network, database and

automatic control technology to realize integrated design of automatic control and information

management. It is featured as open structure, favorable hardware compatibility and software

extendibility. It is extensively used in the process automatic control and information monitoring

and management in industries like heat-engine station, nuclear power, hydropower station, new

energy, metallurgy, petroleum, chemicals, paper-making, concrete and sewage treatment.

EDPF-NT is applicable to various large and complicated industrial process control, and can frame

simple system to satisfy requirements of small-scale and low cost application. EDPF-NT is an

advanced process control system facing the whole production process.

1.1. Development history of EDPF-NT

Beijing GuoDianZhishen Control Technology Co., Ltd. started to develop EDPF series of DCS

with completely independent intellectual property since 1980s.

Based on borrowing ideas from product technology and concept of foreign automation control

systems, the Company developed the first dispersing microcomputer monitoring system

EDPF-1000 in China in 1988, and received the third prize of state scientific and technological

progress. Through a couple of years of efforts, the Company developed the first DCS product

EDPF-2000 with completely automatic intellectual property in China successfully in 1992.

Thereafter, the Company also released EDPF-3000 DCS using UNIX operating system platform

with good openness. In 1990s, EDPF series of DCS were widely used in automation

improvement projects of 200 MW thermal power units, and stood up to double examination of

plenty industrial practical applications and production running for a long time.

The latest automatic system product of EDPF family -- EDPF-NT was released in 1998, and

found wide use in industrial automation field immediately. A new generation of EDPF-NT, which

had incorporated the latest achievement of science and technology, was applied to the largest

thermal generating unit in China in 2006, which marked the performance of automatic control

system product of China stepping on a new stage, and had major practical significance on

improving the automation level of large size industrial enterprises in China.

EDPF-NT is a set of large-scale automation control system of international advanced level

developed against the requirements of large-scale complicate industrial processes. EDPF-NT has

integrated the merits of system EDPF-1000/EDPF-2000/EDPF-3000, adopted flexible domain

partition technology and architectural structure of distributed database without server, and

included developing Project Organizer and workstation software cross operation systems and

platforms to provide super performance capability under harsh environments, support seamless

connection of various field-bus equipment, and enable the function, performance and reliability

ranking among internationally advanced level.

Beijing GuoDianZhishen Control Technology Co., Ltd. executes the support project of the

National Development and Reform Commission on localization of manufacturing key technical

equipment of industrialization, adopts the latest achievements in fields of computer science,

network service technology and automatic control, and conducts plenty upgrading and developing

of EDPF-NT with independent intellectual property, so as to satisfy higher technical requirements


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of large industrial processes on control system. Introduction of new technologies has made it

more suitable to be used as station-level automation control system platform of higher monitoring

mode integrating enterprise management and control. Its characteristics are improved day by day

with stronger functions. The overall performance of EDPF-NT has ranked internationally leading

position, including some technical criteria exceeding current similar DCS technical features at

home and abroad. EDPF-NT has found wide use in various industries and fields like thermal

power, hydropower, metallurgy and chemicals. By the end of 2011, merely the capacity of

generators concerning EDPF-NT in commission in power sector has exceeded 61000 MW in

accumulation, including 6 units of 1000 MW ultra-super-critical generators, that are the largest in

China, 1 unit of 600 MW super-critical cycle fluidized-bed generator, which is the largest in the

world, 4 ×165MW large-scale hydropower stations and more than 40 units of 600 MW generators.

As the earliest domestic distributed control system running on 600 MW super-critical units in

China, realizing industrialization successfully, the earliest system applied on 1000 MW

ultra-super-critical unit and completing batch application, EDPF-NT has been developed into the

main force of China in high-end automation field breaking up foreign monopolization, and

currently the sole distributed control system product in China able to compete with foreign

well-known enterprises in automation control system tendering of ultra-large generator and

achieve success, and established the image of high-end brand of domestic automation system

successfully.

1.2 Primary standards and codes of system

EMC standards:

GB/T 17799.2-2003 (IEC61000-6-2) Electromagnetic Compatibility--Immunity Test in

Universal Standard Industrial Environment

GB/T17626. x-2006 (IEC61000-4-x: 2002) Electro Magnetic Compatibility of Industrial

Process Measurement and Control Equipment: Testing and Measuring Technology

Environment test and anti-corrosion standard:

GB/T 2421 － 1999 Basic Environmental Testing Procedures of Electric and Electronic

Products, Part 1: General (idt IEC 68-1: 1998)

GB/T 2424.2 － 2008 Basic Environmental Testing Procedures of Electric and Electronic

Products: Guide Rules for Damp Heat Test

GB/T 2423. x － 2008 (idt IEC 60068-2-x) Basic Environmental Testing Procedures of

Electric and Electronic Products

GB/T 17214.1 － 2005 Industrial Process Measurement and Control Devices, Operating

Conditions, Part 1: Climatic Conditions (idt IEC 60654-1: 1993)

GB/T 17214.4-2005 (IEC 60654-4: 1987) Operating Conditions of Industrial Process

Measurement and Control Devices, Part 4: Corrosion and Erosion Effects

ANSI/ISA-S71.04-1985 Environmental Conditions of Process Measurement and Control

System: Air Pollution

Electrical safety standard:

GB4943 — 2002 (IEC60950) National Safety Standard of Information Technology Equipment

IEC 61010-1/GB4793.1 Safety Requirements on Electric Equipment for measurement,

control and Laboratory, Part 1: General Requirements


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PLC standard:

GB/T15969. x (IEC 61131. x) Programmable Controller

Testing and acceptance codes:

GB/T 18272-2006 (IEC61069) Assessment of System Characteristics in Industrial Process

Measurement and Control System Evaluation

GB/T 18271.1 － 2000 Evaluation Method and Program of General Performance of Process

Measurement and Control Devices, Part 1: General (idt IEC 61298: 1995)


Measurement and Control Devices, Part 2: Test under Reference Conditions (idt IEC

61298-2: 1995)

GB/T18271.3 － 2000 Evaluation Method and Program of General Performance of Process

Measurement and Control Devices, Part 3: Test on Effects of Influence Quantity (idt IEC

61298-3: 1995)


Measurement and Control Devices, Part 4: Content of Assessment Report (idt IEC 61298-4:

1995)

DL/T 655-2006 Acceptance Test Rules on Safety Monitoring System of Boiler Furnace of

Thermal Power Station

DL/T 656-2006 On-line Acceptance Test Rules on Turbine Control System of Thermal Power

Station

DL/T 657-2006 Acceptance Test Rules on Analog Control System of Thermal Power Station

DL/T 658-2006 Acceptance Test Rules on Sequential Control of Thermal Power Station

DL/T 659-2006 Acceptance Test Rules on Distributed Control System of Thermal Power

Station

Other design standards:

DL/T1083-2008 Technical Specifications of Distributed Control System of Thermal Power

Station

DL/T 5175-2003 Technical Regulation on Thermal Control System Design of Thermal Power

Station

JB/T 6810-2014 Reliability Design Codes on Functional Template Module of Dispersing

Control System

GB/T 4208-2008 Case Protection Level (IP code)

JB/T 9270 － 1999 Inspection and Test Method of Process Input/Output Channels of

Industrial Control Microcomputer System

1.3 Main technical features of EDPF-NT

Advanced network topology

EDPF-NT data highway adopts high-speed industrial Ethernet protocol and peer network

structure without web server. It will never yield network bottle neck or hazard concentration, but

realizes dispersion of functions and risk.

Application to station level

The multiple domain network structure based on distributed real-time database and distributed


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computing environment adopts flexible domain partition technology to manage complex process

in domains as per process or function, which has solved the puzzles of high-performance

insulated interconnection and centralized monitoring of multiple control systems successfully,

provided technical base for large scale integration and running of automation control system, of

which the size of the systems may reach 1200,000 points, and satisfied process control demand

of various industries in deed.

Thorough redundant configuration

Key components of system like EDPF-NT data highway, process control station controller, power

supply, I/O module, I/O channel and interactive workstation can support redundant configuration.

The switching time of primary/standby controllers with warm standby mutually is less than 10 ms.

Network reduncancy of parallel dual-network has avoided the abuses of network switching,

improved instantaneity, reliability and fault-tolerant capability of system. Capability of redundant

configuration of I/O channels has significantly satisfied the application requirement on high

reliability.

Fault safety design of control system process

Fault safety of control system process is a key guideline in application design of EDPF-NT. Fault

safety is highlighted in aspects like configurations of control system, design of control logic,

realization of emergency trip function and countermeasures to extreme cases, so as to prevent

resist-operation of equipment, and improve safety level of control system effectively in case of not

increasing costs of control system.

New distributed real-time database

It has realized multi-domain distributed real-time database without server. It manages large data

volume of large scale system in partitions, which can reduce information complication and

network load, facilitate separate configuration and easier centralization of management. It has

realized multicasting real-time data within and among domains and subscribing two data

refreshing modes, which can choose the renewal strategy of real-time database based on

configurations of real system and balance the node loads of sender and receiver. The total

capacity of real-time database is more than 1200,000 points.

The high-capacity distributed real-time database taking station as basic unit adopts database

engine kernel based on cluster indexing technique, which has solved the problem of mutual

interference arising in stepped commissioning of DCS project magnificently, improved dynamic

security of system, and broken through the bottleneck of real-time performance. Partial

modification of database has no effect on other parts of the database, thus it is unnecessary to

recompile or load entirely.

Cross-platform system software

The software of distributed process control station and man-machine interaction equipment of

EDPF-NT is compatible to Windows and Linux operation systems, so as to adapt to the

requirements of different application domains on software environment. In the meanwhile, it has

spread the system functions. For example, the virtual DPU program running on Windows platform

is completely consistent with the program function and characteristics of DPU controller running

on dedicated hardware platform (using hard real-time kernel of Linux operation system), which

has created favorable conditions for development of simulation software of control system.

LINUX operation system is featured as openness, safety, high efficiency, stability and limited virus

attack. Replacing Windows with LINUX can ensure complete automation of kernel software of


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control system, and enable EDPF-NT with excellent characteristics of safety and controllability.

Full free-form format SAMA graphic control configuration software

Convenient full graphic SAMA chart control configuration function, very visual, easy-to-learn and

ease-of-use, what-you-see-be-what-you-get. Design drawing, configuration commissioning

drawing and as-built drawings are identical, and convenient for maintenance.

Dynamic loading technology of algorithms library of process control station

The algorithms library of process control station separates from the principal part of DPU support

software, both available for independent upgrading, on-line adding or replacing algorithm

respectively. It is not only convenient for upgrading and maintenance of system, but also provides

flexible function of customization to users. It convenient to develop special algorithms library

aimed at different control objectives and process control fields. It supports user to compile

advanced control algorithm through providing EDPF-NT add-value development kits.

History data recording station of high performance

EDPF-NT history data recording station has superior performance and stable operation.It adopts

revolving door compression technique to collect and save the parameters in production process

and derived data, provides basic data platform for optimized enterprise management, and

responds multi-user parallel query at second level. When 100,000 points of history data are

collected, it is still able to respond multi-user parallel query quickly. A couple of years of

production data can be saved easily through "volume" management function and with the help of

external storage medium. In the meanwhile, the system supports configurations of double history

stations, so as to ensure one history station can save data normally in case of the other one in

fault status.

Sophisticated on-line self-diagnostics

EDPF-NT has complete background layered software and hardware in-depth self-diagnosis

function, which can diagnose network, station, I/O modules and I/O channels.

Strict and comprehensive safety protection technical measures

The active safety protection system of EDPF-NT includes real-time scanning monitoring, safety

reinforcement immunization, virus defense and network intrusion defense, which build up a

complete multi-layer in-depth protection system from boundary to kernel in methods of separate

treatment, active monitoring level by level and overall coordination to protect safety of control

system.

The core operating system of EDPF-NT adopts LINUX to improve the safety and controllability

level of system. The safety and controllability capability of system is improved further through

complete automation of hardware and communication ground-up encryption.

Exclusive small and exquisite modular DPU controller

The controller of process control station adopts the latest embedded industrial microprocessor

with lower power consumption, more reliable operation and simpler maintenance. The integrated

special communication processor has enhanced performance of I/O bus, and mitigated the load

of main processor.

Advanced clock synchronization technology of process control station

The controller of process control station has built-in signaling interface of GPS PPS synchronous

clock, and the controller keeps clock synchronization with I/O modules highly through clock circuit,

which enables the time synchronization among control stations reaching millisecond level and

ensures cross-station SOE precision less than 1 ms. SOE module can be installed in any process


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control station separately.

Highly intelligent I/O modules

Each I/O module is designed with a CPU processor, communication coprocessor and redundant

network bus interface. Plenty driver level output modules with advanced control function and

aimed at various industrial working environments have been designed and produce based on

intelligent I/O modules.

Hardware systems of high reliability

The Company has developed redundancy unnecessary to switch over system networks and quick

switching of controller at millisecond level, and realized redundant switching analog input/output

channel level for the first time in China.

Aiming at high security requirement of process control, EDPF-NT system has particularly

designed and developed I/O redundant function to support channel-level redundant switching of

I/O modules. As compared to module-level redundant switching of I/O modules, channel-level

redundant switching has significantly improved the fault-tolerant capability of module in case of

crossing channel fault, and the average failure-free time has improved 1.5 times in theory.

Intensified structure design

All I/O modules adopt metal case whole sealing structure with features of dust-proof,

moisture-proof, anti-corrosion, static-free and anti-electromagnetic interference. It can be

installed at industrial site directly.

Resisting adverse working environments

The circuit boards of I/O modules are applied with military three-protection paint with super

capability of moisture-proof, anti-acid mist and salt fog resistance. It is particularly suitable for self

improvement of enterprise.

Built-in channel electric isolation mounting

All I/O channels adopt optical isolation and power isolation technique to realize electric isolation

to external and among lines.

Super protection capability

I/O channels are designed with PTC strong current protection circuit. When strong current signal

is wired in by accident, the channel will cut out for protection automatically, and return to normal

after strong current signal removed.

Application of virtual controller

With the help of cross-platform software transportation technology, the virtual controller software

of EDPF-NT system has almost identical functions and characteristics with the real controller

software, which has realized high accuracy simulation of control system, can be used for exciting

simulation industrial systems like heavy-duty generator, and comprehensive simulation test on

control policy, and support further extension of application functions.

Favorable openness

Independent and innovative extension IO interfaces (EIO) have provided uniform and flexible

access platform for various fieldbus equipment. It supports various network communication

protocols and multiple fieldbus standards.


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1.4 Main performance index of EDPF-NT

Performance index of system

System supports 100 domains and 1200,000 points;

Average load rate of network is 3.08 %, while maximum load rate 3.19 %;

Maximum controller load rate 20.6 %;

Precise and stable execution cycle of controller, minimum 10 mS;

When controller cycle 250 mS, mean response time to operating command 236 mS,

longest response time 300 mS.

Data highway communication network

Communication rate of 100/1000 MB/second based on fast switching industrial

Ethernet;

Technology adjoining multicasting and publish-subscribe to reduce network load

effectively;

Flexible domain partition, isolation among domains controllable, supporting 100

domains ×250 stations;

No real-time data concentration server, no network transmission bottleneck, no risk

concentration point;

Network redundancy system of double receiving and sending, no switching;

Real-time monitoring of network abnormality.

Process control station DPU (distributed processing unit)

X86 low power processor, dominant frequency 500 MHz;

Controller redundant warm standby, switching time of primary/standby controllers

less than 10 mS;

256MB RAM, 256MB FLASH；

Real-time Linux operation system;

Capacity of tag point up to 65000 points/controller;

Supporting hot plugging and on-line downloading;

Supporting 5 scanning periods, 10 mS-60S adjustable;

Redundant I/O bus using HDLC protocol (high-level data link control), rate 2 Mb/S;

Hooking up to 64 I/O modules/stations;

Processing up to 2048 digital quantities or 1024 analog quantities.

Input/output level network

Form of input/output level network: extension input/output bus (EIO) based on

industrial Ethernet connects to various fieldbus through protocol converter:

IOBUS bus protocol converter: special I/O bus for EDPF-NT system, internet

protocol: HDLC & RS485, synchronous data transmission;

FROFIBUS (master station) protocol converter: FROFIBUS DP fieldbus interface;

FF protocol converter: FILEDBUS fieldbus interface;

MODBUS protocol converter: MODBUS RTU/ASCII fieldbus interface;

MODBUS/TCP protocol converter: industrial Ethernet equipment interface;

Transmission tunnel of fieldbus equipment: providing fieldbus equipment manager

and direct linking channel with bus instrument;

Input/output level network can have redundant configuration.


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Input/output modules

All I/O modules adopt double-circuit DC power supply;

Metal case whole sealing reinforced structure with features of dust-proof, static-free,

anti-electromagnetic interference, and maintenance-free in life-cycle.

Unique PTC electrical protection technology, measuring channel capable to 250

VAC/DC AC signal free of damage;

Signal isolation, power isolation and communication isolation in I/O channels, triple

isolation measures enabling system with powerful interference-free feature;

The surfaces of module circuit board and components are processed with special

paint with featured of mould-proof, moisture-proof and salt fog resistance;

Large signal precision 0.1 %, small signal precision 0.2 %;

Resistance to common mode voltage larger than 1000 V;

Common-mode rejection ratio larger than 90 db, differential mode rejection ratio

larger than 60 db;

Hot pluggable;

Local or remote I/O capability;

Terminal seats of module rail-mounted, built-in connector reducing power and

communication wiring,

Performance index of upper computer:

Image refresh rate 500 mS;

Supporting monitor display of multiple panels and multiple windows;

Supporting Windows and Linux operation systems and different application

demands in the meanwhile;

Integrating development environment-Project Organizer as per project

management;

Supporting standard full graphic control configuration of SAMA;

The virtual DPU running on upper computer is completely consistent with the

functions of real controller, which is convenient for simulation commissioning of

system and supports further function extension.

Performance index of history station

Using revolving door compression technique;

Responding multi-user parallel query at second level;

'Volume" management function, able to save history data permanently and provide

fast query;

Supporting redundant configurations of history station.

1.5 Severe quality assurance measure

1.5.1 Implementing ISO9001 quality management system thoroughly.

1.5.2 The production and inspection process of controller and I/O modules in hardware units

execute comparable standards of aerospace industry, of which the strictness and rigorousness

can ensure ultra high reliability of hardware units.

1.5.3 All hardware units are subject to rigorous high-temperature and power-on aging tests, which

fatigues the products with high-strength periodic cycles in specific environment test chamber －


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20 ℃～70 ℃, rejects products of earlier failure effectively, ensures ex-works acceptability and

long-term stable and reliable operation of hardware products, and guarantees the overall quality

level of equipment.

1.5.4 After multi-year practices of DCS applications, the Company has integrated plenty

application software module and optimization control software module through inspection of

practice. In project applications, plenty using of these basic modules can improve project speed

and ensure project quality.

1.5.5 Matured and sophisticated total system simulation program, strictly implementing ex-works

testing and acceptance procedure.


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Chapter II Structure and basic frame of EDPF-NT

2.1 Structure of EDPF-NT

EDPF-NT is a set of advanced process control system designed and developed incorporating the

progressive ideas of numerous similar international systems and conditions of China. EDPF-NT is

based on network communication system, takes "station" as primary element, which faces to

function and objective, and the distributed dynamic real-time database designed specially is used

for management of all data demanded for system operating dispersed over all stations.

As further improvement of requirements on enterprise benefits and effectiveness, enterprises are

no longer satisfied with automation level development of device or single system, instead of

taking the whole station as an organic body in operation, control and management. EDPF-NT is a

new automation control system platform developed after absorbing the latest achievements of

computer technology, network service technology and automatic control technology, exactly

satisfying the demand of large size industrial enterprise on whole station comprehensive

monitoring.

EDPF-NT supports multiple domain network environment based on distributed computing

environment (DCE) facing station level applications. It adopts flexible domain partition technology,

manages complicate production process in domains as per process or function, and has solved

the functional requirement of multiple control systems on isolation, interconnection and

centralized monitoring successfully.

EDPF-NT system can be a large-scale distributed control system integrating multiple "domains".

Each domain is a middle or small system, which completes relatively independent function of data

collection, processing and control. All domains are connected with each other through network to

develop a large-scale integrated automatic system. All domains are isolated with each other, and

information among domains can be isolated or exchanged selectively upon request, which can

reduce the size of information process of all functional subsystems, reduce and eliminate

coupling among different controlled devices and control systems, promote cellular structurization

of the whole control system, and improve system reliability.

EDPF-NT based on flexible domain partition technology supports the demand of massive

applications, requirements of complex process on high performance, highly openness and

integration capability of third-party equipment and higher monitoring mode requirement of

integrated management and control.

The stations of EDPF-NT system include two general categories: controller and (MMI)

man-machine interaction workstation.

The controller of EDPF-NT system can be the controller of real process control station, or a virtual

controller running on a general computer.

MMI workstations can be distinguished into engineer station, operator station, history data

recording station, computer station, report station and interface workstation as per functions. One

computer is permitted to install MMI workstation software of multi-functions in the meanwhile to

construct comprehensive MMI workstation.

A MMI workstation can add to multiple "domains" in the meanwhile, but a controller only belongs

to one "domain".


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The system composition as per the following chapters.

2.2 Layered multi-domain network communication system

2.2.1 Network communication system of EDPF-NT shall be distinguished into three layers:

Data highway MCN (Management and Control Net),

EIO (Extended Input/Output),

FIO (Field I/O).

The system packs technical details independent from the outside world at each level, which

enables information flow of different levels and types going their own ways, and reduces crossing

and coupling of information streams. The nodes at each layer only face the data demanded and

interested. Private or standard communication protocols are designed, realized or directly

adopted aiming at features of local layer specially, which is convenient to comply with universal

standard while ensuring information security and keeping self features, and realize open network

structure.

2.2.2 MCN layer is the upper layer management and control information network of EDPF-NT

system, and the bridge of MMI workstation and controller station realizing information exchange.

It adopts industrial switching Ethernet in any network topology like star type/loop type/tree

type/bus type. Dual-networks are parallel in redundancy. The network communication rate can be

100 Mbps or 1000 Mbps, and network refreshing capability within domain shall be 320,000

points/second.

MCN supports "distributed computing environment". It is based on TCP/IP protocol, and provides

network communication service for the total system. It adopts object-oriented approach design

and realization.

Physically, MCN can be multiple switching Ethernet linked through intelligent network switch. The

intelligent network connecting device among domains can provide further security isolation

among various sub-nets. Logically, all nodes on the entire network are organized into multiple

"domains" independent with each other. It supports up to 100 domains. Each domain holds up to

253 stations. The communication among all domains are mutually isolated and non-interfering.

MCN has no real-time data server logically and physically, instead of running on network of any

topology structure in flat or peer mode, without concentrated storage or forwarding of data or

extra data translation. The real-time data flow channel has no bottleneck, but each network node

uses band with sufficiently and evenly without outstanding hot spot. It has also avoided delay

triggered by data route forwarding. Particularly in case of accident, the network data flow will not

jump, data flow will not buildup at node of web server relevantly, or there is no worry of web server

in fault resulting in total system collapsed.

2.2.3 EIO is located at layer 2 of three-layer network structure, a information exchange mode

newly defined for external equipment like controller, controlled device, and third-party equipment.

EIO is upward compatible to controller and virtual controller, downward compatible to local I/O,

EIO or virtual card accessed through Ethernet, network I/O based on fieldbus protocol.

EIO network is compatible to industrial Ethernet protocol. The topology structure of network

can adopt tree or loop type.Network redundancy is supported.

EIO network segment is not limited to one controller, but two or more controllers can manage

and use the same EIO network segment in the meanwhile. Controllers can stack on the

same EIO network segment, thus it can realize extend and reallocating of control functions


12

on the same EIO network segment. A couple of DPUs can share 1 EIO network, and

establish a super control unit (SPU), while a SPU can have a couple of EIO network

segments internally.

EIO has defined a set of uniform mode of information description, which can describe the

local I/O points, local cards, local algorithms, remote I/O points, remote algorithms, and

remote control strategies uniformly.

The control function can distribute realization and centralized administration among

controllers and EIO network access equipment.

EIO network provides transmission tunnel for configuration of site equipment and adjustment

information, and transparent transmission channel for real-time information and non-real time

information.

Integration of hetero-system. At EIO layer, it can integrate third-party systems like simulation

and PLC in the same way.

EIO supports network I/O based on EIO protocol, and other standard fieldbus devices accessed

through protocol converter. Through EIO, it can provide complete support to various fieldbus

equipment.

Introduction of EIO technology has overturned the organization of process control station of

conventional DCS, and the openness of system is extremely improved.

2.2.4 FIO protocol at field input/output layer is provided by I/O subsystem equipment at field layer

of access system. It supports various standard and private fieldbus transport protocols, e.g.

FROFIBUS DP, FIELDBUS, HART, MODBUS RTU and IOBUS of EDPF-NT.

2.3 Distributed process control station (DPU)

Distributed process control station (DPU) mainly completes data collection, processing and

control of production process of the controlled process objective. Process control station is mainly

composed of components including cabinet, redundant power, redundant controller, redundant

I/O bus, smart I/O subsystem, and fieldbus communication module at procedure level. Among

others, the redundant controller and I/O subsystem are linked with redundant high-speed I/O bus.

Controller and I/O subsystem permit distributed arrangement, and the performance is not

reduced in the range of 40 km in case of deploying special I/O bus fiber extension module.

Distributed process control station implements data acquisition and processing to field process

signal, and implements control calculation as per control policy of configuration, outputs

regulatory signal to operating mechanism realize process control over the controlled device.The

controller of process control station has built-in LINUX hard real-time operation system kernel,

system support software and control algorithm module library for real-time multitasks scheduling

as per priority modes.

Distributed process control station adopts warm standby redundancy to realize redundant

configuration of controller. Primary/standby controllers are equipped with 2-unit monitoring circuits

respectively. In normal operations, the master controller owns the control power of input/output

and station calculation, and transmits the performance data and process of its own to the backup

controller through 2-unit monitoring cards in real time. The backup controller receives information

from the master controller in real time and keeps synchronization with the master controller. The

backup controller monitors the working condition of the master controller through 2-unit

monitoring cards in real time. Once the master controller fails, the backup controller will grab the


13

control power of input/output and station calculation undisturbedly and immediately, so as to

ensure absolute control of the process station over process objective. Primary/standby controllers

can complete control power switching in 10 ms completely undisturbedly. When primary/standby

controllers switch, the system will send alarm information through network and panel indication of

controller to inform system operator. The switching process will never cause the process

communication interrupted or data lost.

Each controller station can contain 65000 points.

2.4 Engineer station (ENG)

Engineer station is mainly used for system configuration and maintenance. A system domain can

have multiple engineer stations, or the complete set of multi-domain control system only uses one

engineer station. An engineer station is added to each DCS domain to be global engineer station,

so as to configure and maintain the decentralized control subsystems in multiple domains in the

meanwhile.

The complete system needs to assign a global engineer station as project server. A project

merely sets up an authorized project server, while the other engineer stations can be subject to

remote operation through network accessing project server and complete all tasks of

configuration. The project server is designed with interlock function to ensure uniqueness of data.

Engineer station is liable to plan system size, create project, complete domain and station

creation, and generate system database, monitoring operation panel, control algorithm, warning

function and report function. In the meanwhile, it has functions like downloading and uploading

control applications of process control station.

Engineer station is installed with functional software including Project Organizer, project server,

security policy creator, projecting configuration and management software kit, point record bulk

operation tool, DropTool, virtual controller and time synchronization tool.

2.5 Operator station (OPR)

EDPF-NT OPR is a main man-machine interaction equipment provided by the control system. It

has provided a powerful operating environment for operators. An operator realizes computerized

monitoring operations of the controlled technological equipment with keyboard and mouse

through the multiple windows of operating station, including graphic flow diagram, trend panel,

parameter list display, process alarm display, history trend panel and control adjustment.

Standard operator station is equipped with completely identical software and hardware system for

backup of each other.

Operator station can be added to multiple control domains in the meanwhile to have global

characteristics, and can monitor and operate the controlled technological equipment on multiple

domains in the meanwhile.

Operator station provides the following primary functions:

Display operating function

Alarm display and processing function

Control operation function

History event query function

Operation record query function


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Operation instruction function

2.6 History data recording station (HSR)

HSR adopts exception report and binary compressed format to collect and save the system data

in real time, including catching and recording of events like alarm, log, SOE, accident recollection

and operations, and history trend collection of modulating parameters and secondary parameters.

HSR can respond multi-user parallel query. History data can be saved for permanently through

"volume" management function and with the help of external storage medium for fast query.

2.7 Report station (LOG)

Complete regular reporting like shift report, daily report, monthly record and small target

competition, collection and organization of incident remembrance report, reporting caused by

time or event and reporting requested from time to time. These reports can be printed promptly

and timely, or as requested by operator. The report head and format can be defined via

configuration of engineer station.

2.8 Performance computer station (CAC)

CAC mainly provides two functions: programming and operating environment for large special

computation software; and developing and running platform of special software for customer

engineer. Performance computer station provides programming interface of DCS real-time

database and software development kit. Skilled customer engineer can compile dedicated control

and computation software, enable seamless connection with DCS, and add function of control

system as per self requirements.

2.9 Multi-function interface workstation (GATEWAY)

Large-scale data two-way communication interface connected to third-party computer system.

Supporting various international standards and communication protocols. For the purpose to

ensure security of data transmission, GATEWAY can be equipped with software and hardware

network firewall or one-way isolation gateway.

All functional stations of the aforesaid EDPF-NT have been designed with distributed real-time

database interface. The number of various functional stations can be configured flexibly based on

system size. Application of massive distributed control system can use hundreds of workstations,

and important functional stations can have redundant configuration.In small occasions of

application, the function of multiple workstations can be combined to a single station for

realization.


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Chapter III Network information technology and safety

management and control platform of massive whole station

integrated control system

3.1 Network information technology of massive whole station integrated

system

Massive whole station integrated control system realizes management and control mode with

whole station centralized monitoring and graded monitoring combined, requires interconnection

and intercommunication of control systems of each independent production technology, and

network communications control under large information stream. Therefore, the target of network

message technology of massive whole station integrated control system shall be meeting the

requirements of network communication system on large handling capacity, high efficiency, no

bottleneck, good system expandability and super reliability.

EDPF-NT system has realized the massive whole station integrated control system through three

techniques as follows:

Flat network structure

flexible domain partition technology

Communication technology with multicasting and publish-subscribe combined

3.1.1 Flat network structure

The traditional DCS network communication system can be distinguished into process control

layer and system information layer. DCS adopts computer network to link all distributed process

control stations and frame process control layer, and link all MMI workstations to frame system

information layer. Two layers of network are linked through gateway. Because the DCS distributed

process control station of this structure is usually designed as slave station, the inter-layer

gateway shall have the function of I/O server of control layer equipment in polling procedure at

the same time, thus it is referred to as web server. The information layer of DCS system equipped

with network server adopts C/S structure, and all "stations" are slave stations of network server.

Web server is the bottleneck and hazard concentration point of the total system, and its running

status has decided the stability and reliability of whole DCS system directly. The MMI workstation

with distributed control system of this C/S structure may not access each process control station

directly, instead of all commands even data exchange among control stations to be

stored-and-forwarded via network servers, which results in large transmission delay and

response lag of system on control command. For C/S structure, when DCS runs normally, the

network load is low.However, when the controlled devices run abnormally, the network flow will

jump, which is similar to avalanche effect. Because all data of system shall be transmitted through

web server, it tends to cause serious network congestion near the network interface, and some

DCS control stations or the total system will face dangerous situation out of control, or even result

in overall collapse of the control system. This shows that the DCS design scheme of C/S structure

goes against the working principle of distributed control system: "dispersion of function,

dispersion of risk, information concentration". Facts has proved that web server is the chief culprit

resulting in system hazard concentrated.


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Particular DCS manufacturer compacts the process control layer and system information layer

network for the purpose to evade the accuse on network database server, and enables certain

operator stations with the functions of network database server concurrently. This DCS of invisible

web server structure has not changed the C/S structure problem at all, the default is still there, but

the load of other MMI workstations are heavier, and the operating condition worsens, which shall

be worried.

EDPF-NT has combined the process control layer and system information layer network

(flattened network). All DCS devices are even network nodes of data highway. The system adopts

multicasting and point-to-point unicasting communication means without web server, thus there is

no problem of hazard or function concentrated or network bottleneck. All operating commands

sent by MMI workstation will be sent to process control station directly. Any fault will be limited to

the limited range, instead of resulting in system crash, and it has realized dispersion of function

and dispersion of risk in deed.

3.1.2 flexible domain partition technology

Modern intelligent large size industrial enterprise urge for configuration of automation control

system taking the whole station process primary and additional equipment or production process

station as one piece increasingly. Whole station primary additional equipment at all levels or

control subsystems of production shop shall be interconnected via computer network. There

cannot have any form of illegal data coupling among control subsystems, however, they shall

establish bidirectional flow channel of legal information, shape a body, and address the special

tasks of station-level control system jointly. The system shall also need to design global operation

and monitoring devices to monitor any controlled process equipment in the whole station in the

meanwhile.

Currently, the prevailing global distributed control systems have constantly "climate sickness" in

this new demand on control function. The traditional DCS network communication system is

designed based on one network segment linked to all "station"devices. Multiple DCS shall be

interconnected via gateway devices (gateway, bridge, network router or web server). Gateway

configured in system will reduce the overall performance of control system and reliability.

For the purpose to overcome the aforesaid default, in recent years, some foreign systems use

three-layer switching route function of network switch to realize network interconnect of control

system. It has been proved in practice that although this program has good reliability, but the

network load is high, delay of data forwarding is large, and operational efficiency of total system is

reduced.

For the purpose to solve the functional requirement facing station level applications, EDPF-NT

adopts advanced network management technique --ACL access control list and IGMP

multicasting, to develop flexible multiple domain network management function, and has solved

the functional requirement on isolated interconnection and centralized monitoring of distributed

control system successfully. It has satisfied the process control demand of whole station level

enterprise automation control system truly.

The primary function of ACL technique is intended to realize recognition function of data flow.

Network device can filter data package through configurations of a series of matching rules and

recognize the message in need to be filtered. After specific message recognized, the relevant

data packages are forwarded or rejected based on pre-set strategies. Therefore, after relevant

suitable ACL configured by intelligent network switch, DCS subsystems of different domains are


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impossible to be connected directly, thus it has realized complete isolation among DCS domains,

and ensured exact arrival of correct cross-domain data transmission packets.

Thus, it is not necessary to configure specific domain isolation device, which has not only ensured

high-speed passing of data, but also relieved of common and special gateway, which is the

communication equipment with severely adverse effect on DCS performance and reliability,

decreased device category and quantity, simplified system structure, and reduced risk.

Currently, a lot of advanced industrial network switches with two-layer exchange function can

support ACL and IGMP techniques. This technology can realize interconnection of multiple

control systems, provide features of high reliability, fast running speed, and low network load, and

improve the performance of overall control system greatly.

The system adopts flexible domain partition technology to manage complex process in domains

as per process or function. Each domain is relatively independent, and information among

domains can be isolated or exchanged selectively upon request, which can reduce the

processing size of all functional subsystems, reduce or eliminate coupling among different

controlled devices and control systems, and promote cellular structurization of the whole control

system. Automatic complete control system based on flexible domain partition technology

supports the demand of massive applications, requirements of complex process on high

performance, highly openness and integration capability of third-party equipment and higher

monitoring mode requirement of integrated management and control.

The whole station level EDPF-NT using this technology is composed of multiple decentralized

control subsystems working in different network domains. The control system in each domain has

independent DCS full kernel structure, which is corresponding to a set of relatively independent

process controlled device or station respectively. They are linked into a body via data highway.

The control systems in all domains are mutually insulated and running independently. In the

meanwhile, the valid and effective data can flow in two-way among control systems of all

domains.Various MMI workstations can become the within-domain or global devices manage and

operate the decentralized control subsystems and the controlled devices in these domains after

adding to single domain or multiple domains.

Engineer station is designed and installed with "Project Organizer" aiming at multi-domain

application environment, which has integrated the kernel task of control systems engineering

under single application platform. With support of Project Organizer, it is possible to operate the

whole control system including network planning, network domain defining, domain creation,

station creation, point creation, database creation, uploading and downloading. It is possible to

call up the external tools directly like editor of control policy and editor of process image, as well

as software tools with convenient support to control system in life time. Various decentralized

control subsystems can be configured, commissioned and operated independently, then linked to

uniform station-level network in batch and series for uniform monitoring, centralized operation and

maintenance.

The station level automation control system solution of EDPF-NT has simple and distinct network

structure, compact and reliable configuration mode and control function, which has directly

mitigated the working load of running and maintenance staff. It has great technical superiority as

compared to other DCS solutions.

For the purpose to test the capacity of EDPF-NT undertaking whole station integrated control

system, large-scale power station equipped with 6 units of 1000 MW thermal generators is taken


18

as test object. The 6 ×1000MW unit whole station primary and additional equipment integrated

control system model has been designed based on the real data of 1000 MW units before

implementing strict pressure simulation test of network communication system. In case of of

network domains up to 25, and data quantity up to 1200,000 points, through field measurement of

11 key observation points, various operating indexes of EDPF-NT network communication system

have satisfied the technical specifications of the power planning institute.

3.1.3 Communication technology with multicasting and publish-subscribe combined

It realizes information within domain multicasted as required and information of each domain

separated as per exchange port, and reduced the network data switching load and node message

routing and receiving load.

Receiving and processing of excess port data in routine control system network communication

will worsen the working environment of controller, and then effect the reliability of control system.

EDPF-NT system adopts release/subscribe and multicasting technology, in which the releasing

station only broadcasts the data demanded (subscribed) by other devices, and the data not

subscribed by any device will not appear on network, which has reduced broadcasting data

volume effectively. Multicasting technology has shielded the DPU controller from receiving

broadcasting data packet outside the domain, and reduced the communication receiving and

processing load of DPU controller greatly. And it has improved the overall reliability of massive

control system.

3.2 Safety management and control platform

After power station has realized the management and control integration with DCS as kernel, all

key infrastructures rely on DCS highly, any rule-breaking operation, virus damage, network attack

or intrusion aiming at control system may result in consequences in the lap of the gods. Therefore,

in construction of digitized power station, there is no time to delay in reinforcement of information

safety management of integrated DCS.

Beijing GuoDianZhishen Control Technology Co., Ltd. undertook a key project in the advanced

manufacturing technique field of 863 Program in 2007 —— "complete automatic control system

of key projects in thermal power industry". This project has carried on study in aspect of DCS

information security. The Company has proposed "DCS system active safety protection plan" in

2010, and developed the first generation of DCS network safety management and control

platform --NETMON.

Beijing GuoDianZhishen Control Technology Co., Ltd. collaborated with China Standard Software

Co., Ltd. in 2011 for product optimization, adopted NeoKylin safe operation system to improve the

safety protection level of DCS host, and constructed the second generation of DCS network

safety management and control platform — NETMON II.

NETMON II adopts the security control technology and method with active network information

detection and network node equipment safety reinforcement combined, builds up a complete

multi-layer network security system through active monitoring level by level and overall

coordination, provides safe and reliable network operation environment for digitized power station

platform, and ensures business continuity and data security.

The implementation layer of NETMON II reinforces security of overall network devices and the

host, and implements the security policy of DCS security management and control platform, in

four aspects:


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Safety protection of DCS host operating system

It adopts operation system compatible with requirements of Class IV of Chinese standard

GB/T20272 and GB17859, constructs trusted computing base (TCB), and establishes dynamic

and complete security system, and the security policies from kernel to application layer have

realized functions like status identification, compulsory access control, security auditing, white list

control, management of mobile storage medium, data protection and anti-virus.

Safety protection of network boundary

After integrating and configuring devices like IPS, firewall, single (double)-way insulated gateway,

it has realized management and control of communication between DCS network and

surroundings, so as to stop external network intrusion.

Internal safety protection of DCS network

Periodic scanning of system devices (HMI, DPU, network switch, etc.) and topology structure at

network link layer can realize functions like devices and network state monitoring, broadcast

storm suppression, and identification of illegal network access, and generate alarm automatically.

inter-domain security isolation

Configuration of network isolation technique can filter network flow and communication protocol

and realize inter-domain data isolation.

IDS intrusion inspection can realize monitoring of network running status, and do the best to find

various attack attempts, attack behaviors or attack results, so as to ensure the confidentiality,

completeness and availability of network system resources.

Functional

item Substance

Configuration

and

management

function

Support concentrated configuration and management of equipment

Support backup and recovery of configuration file

DCS

System safety compatible with requirements of Class IV of Chinese standard GB/T20272 and

GB17859

Realize terminal application control based on white list

Realize tracking, analyzing and warning functions of system safety event

Industrial control over collection of network flow and identification of real-time industrial

control protocol and contents

Network

Define DCS network topology, and describe physical linkage among devices

Monitor the running status of various node equipment on DCS network in real time

Audit DCS network topology in real time, alarm connection error, and block all illegal network

connection

Support uniform collection and browsing of equipment alarms of the whole network

Support multiple alarming modes, panel blinks, and alarm sounds

Support customization of performance threshold of monitoring performance index

Monitor entry history of data and equipment alarm information for later query


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Chapter IV Monitoring and operating software of

EDPF-NT

Operator station is a key component of EDPF-NT, and a type of MMI station (Man Machine

Interface).

Under real-time running status, an operator can realize real-time monitoring of production process

through operator station.A system may have multiple operator stations, which are mutually

independent, non-interfering, and backup of each other.

Operator stations can provide real-time data of production process for operators in process image,

curve and table, and operators can carry on real-time intervention on production process with the

help of MMI function.

The interactive workstation of EDPF-NT adopts Windows XP/Linux Chinese windows as

operation system platform. Operator station provides abundant monitoring panels of high

resolution and operating performance with prompt response featured as practicality, aesthetic

appearance, easy-to-learn and ease-of-use, particularly suitable for the monitoring and operating

customs of omnipotent operators in China. Operations of panel calling and monitoring control are

realized through flexible mouse or keyboard.

The software of operator station can be distinguished into MMI software and supporting service

software.

The primary function of MMI software is to provide rich information and MMI methods for users. It

accepts operation of user. These software can run or be closed as required from time to time.

The function of supporting service software provides service and support platform for MMI

software, e.g. data collection, communication management, file transfer, while these software

shall be always running.

Some programs like DCS Commander serve as MMI program as well as command outlet of other

programs, thus it shall also be when programs locked to it run.

The following table provides software list of operator station

Program Function Starting Category

DropStarter Station Bootmgr Automatic or desktop

shortcut MMI

AppBar Application toolbar DropStarter MMI

dceM DCS communication

environment DropStarter Service

dFTs File transfer DropStarter Service

tc Collecting real-time

trend DropStarter Service

DCS Commander DCS command center DropStarter MMI

GD Graphics Display AppBar MMI

PntBrowser Point record browser AppBar MMI

AlgDisplay Algorithm browser AppBar MMI


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hsrt History trend display AppBar MMI

td Real-time trend

display AppBar MMI

MsgBrowser Report window AppBar MMI

4.1 Multi-window display mode

Operator station adopts multi-thread technology to support the operating and monitoring

functions of multiple display of multi-window panels. It can open multiple overlapping or

layering windows, while each window is active in real time. It provide panel open window

display, rolling panel display and zooming display of device service conditions, so that the

operators can monitor thoroughly, recognize quickly, and implement correct operations. A

user can use the panel creator provided by system to customize monitoring and operating

panels of own style.

System provides multiple modes of panel calling for convenience of users.Major calling

modes include:

Call up with shortcut key

Call up from directory panel

Click on panel linkage to call up

Call up panel as per before and after pages

Call up with geographic map

Key in panel name to call up

The upper part of display panel is designed with application toolbar AppBar, which provides

the start buttons of various applications for operator.Click these buttons to start relevant

applications.

Fig. 4-1 Tiled display of multiple windows Fig. 4-2 Application toolbar

The display panel supports function of graphic computation, and can configure computation

and conditional statements. Under running status, these statements are executed in real time,

have effects on the results of graphic display, including to change graphical color, alphabetic

character, icon, hide graphics, switch foreground/background, blinking.

The display panel can define various operating zones. An operator can realize various

scheduled operation through operating zone on image,e.g. calling floating menu, opening

another home page, opening a window panel (operating panel or demodulator panel),


22

opening algorithm browser, opening point browser, opening trend window, sending control

command, etc.

Coupling with advanced graphic configurator, a user can design multiple control algorithm

operating zones on the simulated diagram. Click these control zones with mouse, and the

operating panels of assigned devices popping up in windows or switching to control system

panel, so as to complete various control functions and parameter setting with great simplicity

and convenience.

The system provides plenty standard operating panels programmed with 3D graphic

techniques. The definition and using of these operating panels are very simple. A user

merely need to fill in the relevant attribute and parameter names as required. There are

multiple types of operating panels to satisfy requirements of various algorithms and operating

mechanisms. Standard operating panels can be blended with other graphic icons in using to

satisfy special requirement of user. A user can customize special operating panels.

Fig. 4-3 Popping-up operating panel Fig. 4-4 Example of window panel

Fig. 4-5 Example of floating menu

The following table has included some examples of basic control commands

No. Command Function Continuous

execution 1 O_Goto_Manual Switch to manual

2 O_Goto_Auto Switch to auto

3 O_Setting_Inc Setting value

increasing slowly

Yes

4 O_Setting_Dec Setting value

decreasing slowly

Yes

5 O_Setting_IncFast Setting value

increasing quickly

Yes


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6 O_Setting_DecFast Setting value

decreasing quickly

Yes

7 O_Setting_Value Directly set up as

constant

8 O_Setting_IncDec Directly

increase/decrease

setting value

9 O_Output_Inc Output slow

increasing

Yes

10 O_Output_Dec Output slow

decreasing

Yes

11 O_Output_IncFast Output fast increasing Yes

12 O_Output_DecFast Output fast decreasing Yes

13 O_Output_Value Direct exporting

14 O_Output_IncDec Directly

increase/decrease

output value

15 O_P1~O_P16 PK command

4.2 Trend display and group display

Real-time trend display is an important function of real-time data display of EDPF-NT OPR.

Real-time trend display means to display the real-time data of measuring point with curve in a

period of time with spacing from 5 minutes to 1 hour.

All modulating data can be used for trend display. Trend display panels can be distinguished

into temporarily trend panel and fixed trend panel. Temporarily trend panel is used for

operator to form trend panel as required from time to time, and fixed trend panel is the

grouped trend panel pre-set. In addition, a user can also arrange trend display at will in the

panels called out currently.

Each trend display panels can display up to 4 trend windows in the meanwhile, and real-time

curves up to 8 measuring points. A user can customize the window number, curve color and

curve to be displayed in which window.

The definition of grouped trend panels is very simple and convenient, and a user can

organize the grouped trend display as per own requirements. Click operating button to set up

trend display panels, including configuration of data, time, list, trend attributes, coordinate

axis and point color.

A user can open any number of history and real-time data curve windows, just click the left

button on panel, drag parameters to the target window, and query the history and real-time

curves easily.

Fig. 4-6 Display panel of real-time trend 4-7 Display panel of drag parameters to real-time trend

panel 4-8 Display panel of defining grouped trend


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4.3 Processing alarm information

Alarm information reflects abnormal situation of production processes of the controlled device,

and is an important method of operator to learn about production processes. The alarm

management function of EDPF-NT can process multiple types and grades of alarm information

including parameter range over-limit, sensor parameter over-limit, and switching value jumping.

Alarm of parameters can be distinguished into multiple priorities, so as to reflect the significance

level of parameter alarm.

Alarm information is displayed in forms of light-word alarm and report window.

4.3.1 Light-word alarm

When significant alarm event occurs, the alarm information is shown on the current screen in

light-word form. The light-word alarm program advises alarm information with tex and sound to

attract attention of operating personnel.Alarm can be distinguished into two classes as per

severity with different alarm colors configured respectively. The running interface of light-word

alarm shall be shown in figure, including all partitions and groups. Each item in the table indicates

a group. When any alarm at any point occurs, the color of alarm light will blinks unceasingly. If

audible alarm has been configured, the loudspeaker will make a predefined sound.After the alarm

confirmed, the alarm light will not blink, but glows continually till the point value concerning this

alarm restored to normal range.If the alarm is not confirmed, but alarm has been eliminated,

alarm light still blinks, but color is changed.Such alarm will return to normal color after

confirmation.

Fig. 4-9 Panel of light-word alarm group Fig. 4-10 Panel of light-word alarm

The system is designed with function of alarm confirmation, so as to mark if the operator has

learned about parameter alarm or alarm canceling status. The confirmed alarm information will be

discriminated color different color on alarm panel.

The system has screening function of alarm information. For example, it is possible to screen

alarm information as per alarm level or type, and the alarm information only satisfying the

boundaries will be shown on alarm monitoring panel.

The function of sound alarm provided by the system can assign different alarm sound frequency

for different alarm groups or priorities. It can also play specific "wav" voice file for different alarm

information.

4.3.2 Report window

The report window function (MSGBrowser) is used to carry on real-time monitoring at operator


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station and view information in system operation, including alarm, event and user operations. The

report window panel has provided detailed and complete alarm information for operators.

This report window refreshes alarm information in roll mode. The latest alarm event received is

displayed undemost of table, and each line displays an alarm event.

Click on application toolbar AppBar to start alarm monitoring program.

If the operator station receives new alarm information, the icon on AppBar will turn into .

The report window panel can not only provide alarm information reflecting the running status of

the monitored object, but also display important event information reflecting the running and

operational details of system, e.g.: initial start of station, switching auto/manual status of control

circuit, important operations (parameter modification, etc.). Event information can be displayed,

printed on operator station and saved on HSR. This function has vital role for analyzing accident

cause.

The report window provides the function of retrieving information with key words, so that an

operator can locate the alarm event information in multitudinous event information exactly.

An operator can choose "auto roll", "stop auto roll" or " clear up list" to change report window

display.

Fig. 4-11 Alarm information displayed in clipping window Fig. 4-12 Alarm retrieval function

of clipping window

4.4 PntBrowser

PntBrowser of EDPF-NT operator station provides abundant functions of detailed system

measuring point record display. All information of all parameters on panel including the current

value, alarm, hardware-address and quality can be received easily just clicking right button of

mouse.


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Fig. 4-13 Open point record andbrowse panel

4.4.1 Information of point record

Information of point record includes real-time running information and measuring point

configuration information. The configuration information is only for browsing instead of alteration

in PntBrowser.

The real-time information includes latest refreshing data, status and quality of measuring point

concerning production process.A user can stop refreshing of measuring point through PntBrowser,

set up manual value or compulsory setting/reset, compulsory alteration of quality. The basic

information panel of point record displays the basic configuration information of measuring point,

modification disabled.

Real-time information panel of point record displays the real-time data value, status and quality of

measuring point.

The hardware information panel of point record displays the hardware configuration contents of

measuring point, modification disabled.

The alarm parameter panel of point record displays the alarm configuration information of

measuring point, modification disabled.

Fig. 4-14 Basic panel of point record Fig. 4-15 Real-time information panel of point record


27

Fig. 4-16 Hardware information panel of point record Fig. 4-17 Alarm parameter panel of

point record

4.4.2 Classification schedule of point records

Measuring points can belong to different subsystems and types (temperature, pressure, flow,

etc.). Each parameter attribute includes character word. Using character word properly can

screen the parameters with relevant attribute characters in database efficiently and display in

schedule.Classification schedule can also organize display panels as per other attributes, e.g.

analog quantity, digital quantity, alarm point, stop scanning, timeout, measuring point sensor error,

etc.

Fig. 4-18 Classification schedule of measuring point

4.5 Algorithm browser

Algorithm browser (AlgDisplay) is a tool of EDPF NT distributed control system to provide

functions of monitoring and commissioning for site debugger.A debugger can view the real-time

information of various algorithms in controller, real-time value and real-time status of invocation

point, parameters of on-line setting algorithm and send various operator commands through this

on-line browser.

Algorithm browser can be called out from application toolbar, control logic commissioning panel

and point record panel.


28

Fig. 4-19 Algorithm browser

Using algorithm browser can modify the constant parameters of algorithm, send various operating

commands, call up PntBrowser, and view the information of invocation point of algorithm.

4.6 History trend browser

The history trend browser (hsrt) is an important display functional software of history data in

operator station of EDPF-NT Plus system.This function displays the history data of measuring

point in curves and tables.

4.6.1 History trend window:

A user can open any number of history data curve windows, and display up to 4 curve windows,

while each window can be defined with different foreground color and background color, and

each window displays up to 8 history curves of different colors. Each window can zoom up display

curve separately, just clicking the left button on panel, drag parameters to the target window, and

query the history curves easily.

4.6.2 History data retrieval

History data retrieval program (hsr_Retriever) provides query interface to operator in list to

display the alarm and event data incurred.

The functional zones of history data retrieval window involve time configuration, filtering condition

configuration, server configuration and alarm/event retrieval results.

History retrieval results can be screened through configuration of filtering conditions against

retrieval results.

History retrieval results can export alarms and events into different data files through command

"file"-"export".

Fig. 4-20 History trend browsing Fig. 4-21 History data retrieval panel


29

Chapter V Engineer station software of EDPF-NT

5.1 Project Organizer (PO) integrating development style

Aiming at multiple domain network environment supported by EDPF-NT, a global engineer station

can configure and maintain multiple DCS subsystems in the meanwhile, and the system can

provide Project Organizer of the latest design.

Project Organizer (PO) is the project organization tool of EDPF-NT system, running on engineer

station, used for project management, domain configurations in project, station configurations,

management of database point, card configurations, management of SAMA chart configurations

and process image, etc.

Project Organizer can provide convenient on-line operation aiming at active project, e.g.

uploading and downloading of various data files. An engineer station can only have one active

project, and the operations including uploading and downloading are aimed at the active project.

Any project can be switched into active project.

PO can support distributed control system configuration plans of different network topology

structures.

5.1.1 Menu and toolbar of Project Organizer

Menu and toolbar of PO include the common tools of project management (Fig. 5-1).

Fig. 5-1 Toolbar of Project Organizer

5.1.2 Project column of Project Organizer

Use the project column by the left of PO window (Fig. 5-2, Fig. 5-3) to switch various functions of

Project Organizer.

Fig. 5.2 Fig. 5.3


30

5.1.3 Primary functions of Project Organizer

Project management Create, delete and switch over the whole project.

Domain management Create, modify and delete all domains in project.

Point record editing Create, modify and delete measuring point.

Safety management Configure security group and device group of project.

Point group management Create, modify and delete point groups in project.

Station management Create, modify, delete, set up and configure all stations in project.

Fig. 5-4 Project Organizer panel

5.2 Graphic control configurator

The control configuration of EDPF-NT is simple and prompt. The control configuration platform

based on Microsoft Visio supports full graphic control configuration language like SAMA chart and

logic chart. It is convenient to realize customized algorithm.

Graphic control configurator is the tool of EDPF-NT system engineer station to control logic and

I/O card configuration, with features as follows:

Use the full graphic charting interface of graphic design software Macrosoft Visio to draw SAMA

chart directly;

Provide algorithms library with sophisticated functions to users to realize various control logic;

Dedicated compilation tool can convert SAMA chart compiling into target files to be used in

control stations.

Dedicated crossover kit can convert SAMA chart into process images to be used in MMI station

for real-time monitoring and debugging.

5.2.1 Configuration process of SAMA chart

SAMA chart can be distinguished into logic chart and card chart. Among others, the logic chart is

composed of control algorithm, while the card chart is composed of card algorithm. The

configuration processes are slightly different.


31

The the above flow charts, the graphic files generated from editing are referred to as SAMA

charts with file name extension VSD.

The files generated from configuring and compiling (storing) SAMA charts are referred to as

target files with extension SAMA, as binary data files to be downloaded to DPU station.

The files generated from converting SAMA charts are referred to as process image files with

extension GOC, as binary data files to be downloaded to MMI station.

In configuring and compiling SAMA chart, according to the connection among algorithms, the

compiling tool will also create auto intermediate point in the system database of project.

5.2.2 Algorithm library

EDPF-NT system control configuration software provides algorithm library specially developed for

control logic configuration to users. The algorithm libraries include 4 categories, i.e. analog

quantity algorithm, digital quantity algorithm, I/O card and customized algorithm. Algorithm library

includes various advanced modules of control algorithm, e.g. self-correcting PID regulator,

self-adaptive control, Smith estimator. All algorithms are packed in modular, displayed as icon,

and distinguished in types. In using, merely drag them to panel and link with lines.The

configuration process is simple and efficient. Modulating control and switching value control

algorithm can be realized in the same control configuration panel, thus provide the most

immediate and powerful tool for learning about the whole control flow in a better way.

Panel 5-5 EDPF-NT algorithm library

The control logic compiling process generates standard SAMA chart debugging panel, which can

be accessed conveniently with right click of mouse on device process panel of operator station to

query logical configuration simply and promptly.

On the displayed panel, the relationship among algorithms is really visual. Open window can be

used to display the detailed contents of various algorithms, relationship of major input/output and

algorithm status (auto/manual) visually. It is also possible to call out the main parameters of this

algorithm for further adjustment. On logic chart, in addition to displaying the temporal states of

each switching value visually, it can also enforce the switching value as designated state (0 or 1)

manually, so as to realize simulated debugging of logical correlation.


32

Fig. 5-6 SAMA configuration panel Fig. 5-7 SAMA debugging panel

Fig. 5-8 Open window displaying detailed algorithm contents


33

Chapter VI Storage and retrieval of history data, alarm

information and event information

HSR has extremely significant function in EDPF NT distributed control system. It adopts revolving

door compression technique to collect and save parameters of production process or derived

data, including the real-time data, warning message, SOE event queue and operation record of

analog quantity and digital quantity, and save in the medium. The memory capacity of single unit

reaches 100,000 points, and redundant configuration is supported.

Use project manager to configure HSR and point records, and generate configuration file and

survey point list to be used in history station.The history station collects and saves the historical

data and alarm data during production control based on configuration file and measuring point list,

and provides services to other MMI stations including operator station and report station as server,

so as to display history trend curve and alarm historical information list, and develop running

statement.

HSR can also serve as operator station, engineer station, report station and OPC server

concurrently.

Fig. 6-1 History trend display

HSR software is a supporting service software with functions to provide history data storing and

retrieval service to interactive workstations on network, e.g. data collection, communication

management and file transmission, etc.


34

Chapter VII Report function

The report station can achieve three types of reports: regular tabling, incident remembrance and

temporary tabling. Regular tabling and incident remembrance can operate multiple reports in the

meanwhile. A lot of report parameters are optional for users,e.g.: the end of a report can be a

designated moment in one day, or the end of a day or month. Thee period and times of data

collection pre-/post-incident remembrance are specified by users. The data created by report

shall be subject to statistical treatment, e.g.: averaging, integrating, maximum, minimum, etc. The

data created by report can be saved in medium. A report can be printed automatically and

promptly or as required manually. Printing process can be intervened manually, e.g.: suspend,

resume, cancel the current printing etc.


35

Chapter VIII Layered comprehensive on-line

self-diagnostics

For the purpose to improve DCS reliability, EDPF-NT implements multi-layer system software and

hardware on-line self-diagnostics at background continuously, so as to detect, alarm and process

system failure timely. Operator station provides specific diagnostic panel to display the running

status of each section of system, and refresh in real time.

The comprehensive on-line self-diagnostics of EDPF-NT include: on-line diagnostics of

interactive workstation, on-line diagnostics of network communication equipment, on-line

diagnostics of controller running status, on-line diagnostics of all smart I/O modules and I/O

channels, on-line diagnostics of power system.

Fig. 8-1 Layered comprehensive on-line self-diagnostics

Fig. 8-2 Panel of comprehensive on-line self-diagnostics


36

Chapter IX Distributed process control station (DPU)

Distributed process control station (DPU) is the most basic control unit of EDPF-NT. Among

others, the primary/standby controllers adopt embedded fanless-design low-power

high-performance computer, built-in LINUX operation system, real-time multitask kernel and

embedded configuration control software, which have combined functions of network

communication, data processing, sequential control, discrete control, sequential control and

batch processing organically to organize stable and reliable process control system. The

dedicated communication coprocessor polls and controls all on-line I/O subsystems in high speed

through expanded input/output interface EIO. The built-in GPS clock synchronous signal interface

ensures the clock synchronization of process control station to accuracy of millisecond level.

DPU supporting service software functions also include task schedule, I/O management,

communication processing, control algorithm calculation and system diagnostic. The process

control station controller can configure 5 independent arithmetic and control zones, while the

computation cycle of each control zone can be configured independently with minimum value of

20 ms.

The distributed process control station (DPU) links I/O subsystems via high-speed industrial

fieldbus. When using traditional IOBUS bus, it can link up to 64 I/O modules. Each distributed

process control station (DPU) is a small control system. It can realize true distributed control or

processing.

The process channel interface of new process control station of EDPF-NT has broken through

traditional simulated input-output mode, and can be compatible for the all-digital input-output

mode of various equipment and execution level distributed processing mode of instruments.

9.1 DPU controller

DPUIII controller and DPUIV controller of EDPF-NT system are the latest advanced controllers of

this Company featured with small size, high performance, convenient maintenance and super

reliability.

9.1.1 Technical features

Small size, high performance

DPU module has integrated the primary CPU, I/O communication control unit, dual-network card,

shared or exclusive EIO bus interface and GPS module. DPU controller has the same size of I/O

module.

It adopts X86 high performance but low-power CPU with brilliant performance and capable to

satisfy various project demand.

Overlapping processing super real-time performance

DPU controller adopts collaborative work mechanism and structure with multiple CPU

overlapping processing plus CPLD hardware programmable support chip.

The host processor is referred to as the control calculation CPU, liable for key tasks like control

logic processing and real-time data releasing.

Slave processor is referred to as I/O data administration CPU, liable for I/O communication tasks

with large system cost, e.g. data collection and processing, data collection and output of

hardware I/O channels.


37

The host processor and slave processor exchange data in high speed via dual RAM for parallel

processing, which has efficiently improved the speed of data processing, and ensured the

deterministic treatment capacity of I/O data of controller and design capacity of control algorithm.

Complex programmable controller CPLD realizes complex logic like cyclic task dispatching

hardware timer and I/O bus switching, double unit monitoring and switching, GPS hard clock

synchronization processing, and mutual repulsion of dual RAM access, which has shared the

tasks in controller, simplified hardware structure, and ensured the reliability and rapidity of double

unit monitoring and switching.

The structural diagram of controller shall be as follows:

PC104/ISA总线

GPS模块CPU

主CPU

主CPU并口

GPS

信号接

收发送

并口（下载）

从CPU

单片机M68302

铁电存储器双口RAM

上位机控制命令、

监控数据

2个以太网口

铁电控制逻辑

和I/O模块交换数据

程序

存储

器

485转换模块

接收卫星信号

SRA

M缓

存

双口RAM控制逻辑控制命令交换逻辑

ISA总线接口逻辑

CPLD EPM3128 485数据处理

从CPU

主CPU

Fig. 9-1 System structure of controller

Multiple redundancy, safe and reliable

DPU controller adopts the mode of primary/standby redundancy, all MCN network interface, EIO

network interface, IOBUS bus interface, power and significant I/O channels have redundancy

design, which has greatly improved system reliability.

Modular structure, convenient for maintenance;

It adopts modular design, which is composed of DPU units and base plate. DPU modules have

standard European sockets, the primary/standby station can be swapped independently. Both

installation and replacement are convenient and safe.

Reliable DC redundant wide-range power supply

Receive two ways of wide-range DC18-72V power inputs, realize redundant switching internally,

and ensure reliability of power.

Design of full isolation and high anti-interference to ensure reliable operation

Adopts DC/DC internally to insulate from power and I/O communication network, hardware and

software with multiple anti-interference and fault-tolerance correction capability.

Safe and reliable data storage

Adopt CF card to save configuration data without battery, which can ensure permanent storage of

data.

Convenient I/O module connection

In addition to provide terminal I/O outlet, the module base also provides two DB25 I/O standard

interfaces, which can merge with module base directly for convenient panel assembling and

installation.


38

Favorable power and grounding isolation, hot pluggable

9.1.2 Technical parameters of DPU controller

Technical parameters of DPU controller

Power supply Rated redundancy 24～48 VDC, redundant wide-range 18～72

VDC

Power consumption <10W。

Ripple wave <5%

Processor model 500 MHz pentium low-power CPU

RAM 256M

Nonvolatile memory Electronic harddisk: 256M Compact Flash

Ethernet port 2 ×RJ45 twisted-pair interface, 10 M/100M auto-adapted

EIO bus interface Expanded input/output bus interface (DPUIV)

IOBUS bus interface 2 Mbps fieldbus interface + high precision synchronous clock

impulse circuit

Capacity of I/O

subsystem ≤ 64 smart monitoring and controlling modules

Communication protocol

of IOBUS bus

HDLC synchronous data link network transmission protocol,

half-duplex

Communication baud

rate 3 Mbps, 1.5 Mbps, 750 kbps, 375 kbps optional

Switching time of

primary/standby

controllers

<10ms

Network isolation voltage 500V

Serial interface 1: RS232 standard, DB9 needle interface, debugging exclusive

Keyboard interface PS2 keyboard interface, debugging exclusive

Display interface DB15 VGA interface, debugging exclusive

GPS interface

Terminal type, distinguished into GPS and PPS, RS485

standard, GPS communication compatible with NEMA0183

standard or East China Grid GPS adusting time protocol, baud

rate supporting 4800 or 9600, N, 8, 1.

Environment temperature -20～+ 60 ℃ (fan) or-20～50 ℃ (fanless)

Relative humidity 5%～90%

Physical dimensions of

DPU controller DPUIII: 80mm (W)×190 (H)×170mm (D)

Size of controller base DPUIII: 190mm (L)×244mm (W)×30mm (H)

9.1.3 Profile and structure of DPU controller


39

Fig. 9-2 DPUIII redundant controller module Fig. 9-3 DPUIII controller panel

Fig. 9-4 DPUIV redundant controller module

9.2 Smart I/O modules

Fully dispersed intelligent I/O modules has intensified mechanic electrical protection capacity and

high reliability reflected in aspects as follows:

All I/O modules adopt double-circuit DC power supply

Metal case whole sealing reinforced structure with features of dust-proof, static-free,

anti-electromagnetic interference. Maintenance-free is achieved in life-cycle in deed.

Unique PTC electrical protection technology, measuring channel capable to 250 VAC/DC AC

signal free of damage;

I/O channels isolated from external electrics, field interfering source blocked. Signal isolation,

power isolation and communication isolation, triple isolation measures enabling system with

powerful interference-free feature;

The surfaces of module circuit board and components are processed with special paint with

featured of mould-proof, moisture-proof and salt fog resistance;

Use terminal/module integrated technology first of all, which is convenient to system

installation, service and maintenance.


40

Fig. 9-5 Structural diagram of integrated terminal module

The base of I/O modules is combined with outlet terminal of module, power supply of module

(double-way 24 VDC) accesses from base, where has redundant IOBUS bus used for

communication between controller and module. The base is connected to module through middle

two groups of sockets to realize transmission of power supply and signal.

9.2.1 Analog input module

Model: EDPF-AI8 (mA)/EDPF-AI16 (mA)/EDPF-AIH8/EDPF-AIH16

Modulating measurement module EDPF-AI8 (mA)/EDPF-AI16 (mA) is mainly used for current

measurement in range of 0～20 mA, or voltage signal in range of 0～10 V. Current signal passes

250 Ω precise sampling impedance, and supplies system after amplification of meter amplifier

circuit and A/D converter and a/d conversion. After adding redundant recuperation board, it can

realize module and channel redundancy. Modulating measurement module

EDPF-AIH8/EDPF-AI16 supports HART bus protocol.

Characteristics of EDPF-AI8 (mA)/EDPF-AI16 (mA)

8/16 channel 0-20 mA current input,

0-10 V voltage input

Two-way sensor/transmitter

working mode

Support HART bus

Interface insulated with system

Hardware watchdog

Support hot plug

Real-time status display

Support module redundancy

Open circuit/short-circuit detection

Over-current protection, 24 VDC

power supply reverse protection

Characteristics of EDPF-AIH8/EDPF-AIH16

Compatible with HART protocol standard, channel rate of single HART as 1200 bps;

Each HART channel can link up to 15 transmitters; usually one-to-one connection;

HART protocol transition card can process 8/16 HART channels in the meanwhile;

Channel scanning speed at least 2 times/second per channel;

Support transmitter and HART operating mechanism;

Compatible with HDLC control protocol, achieve connection with existing DPU;


41

HART protocol transition card provides transparent channel, and DPU can configure

HART transmitter directly;

Circuit board provides JTAG interface, convenient for upgrading and debugging;

Internally optional series connection is compatible with 24 Vdc power supply of HART

standard (double-circuit redundancy) to supply transducer.

Technical criteria of analog input module

EDPF-AI8 (mA)/EDPF-AI16 (mA)

Description Statement

Input characteristics

Number of detection

channels

8/16 lines of differential inputs

A/D conversion

accuracy

16 bits

Range ability 0~20mA/0~10V

Measuring precision 0.1%@25℃, F.S

Signal multiplication

times

1

Data mode rejection Superior to 70 dB (DC to AC 60 Hz)

Differential mode

rejection

Superior to 60 dB

Current sampling

impedance

250Ω

Sampling rate 5 times per second

Thermal transient ±25ppm/℃

Isolation

Channel isolation

voltage

400V

Communication

isolation voltage

500V

Communication

Communication

protocol

HDLC, synchronous data transmission, half-duplex

Communication rate 2Mbps/750Kbps/375Kbps/187.5Kbps

Power supply

Working voltage Redundancy 24 VDC±5 %

Power consumption

(Max)

4.56W@24VDC (under condition of 16 channels supplied

at 20 mA in the meanwhile)

Working environment

Operating

temperature

0℃~60℃

Operating humidity 5% ~90 % relative humidity, non-condensing

Storing temperature -40℃~85℃

Storing humidity 5% ~95 % relative humidity, non-condensing


42

Physical characteristics

Physical dimension 80mm (W)×190 (H)×170 mm (D)

Protection grade IP50

AI redundant recuperation board


Input/output characteristics

Number of detection

channels

16-line current inputs, 16-line redundant module A

voltage output, 16-line redundant module B

voltage output

Input range Current 0~20 mA

Output range Voltage 0~10 V

Output precision 0.1%@25℃, F.S

Channel current restriction 50mA

9.2.2 Thermistor measurement module

Model: EDPF-RTD8/RTD16

Thermistor measurement module EDPF-RTD8/RTD16 is mainly used for signal measurement of

thermistor (PT100, CU50) in measuring principle of balancing bridge to convert impedance of

thermistor into relevant voltage, and supplies system after amplification of meter amplifier circuit

and A/D converter and a/d conversion.

Characteristics:

8/16 channel thermistor inputs


Support disconnection detection

Hardware watchdog

Support hot plug




Technical criteria of thermistor measurement module

EDPF-RTD8/RTD16



Number of detection channels 8/16-line thermistor inputs

Range ability 0-300Ω


A/D conversion accuracy 16- bit

Signal multiplication times 50


Differential mode rejection Superior to 60 dB

Sampling rate 5 times per second@ Max


Isolation

Channel isolation voltage 400V

Communication isolation

voltage

500V


43

Communication

Communication protocol HDLC, synchronous data transmission, half-duplex


Power supply

Working voltage Redundancy 24 VDC±5 %

Power consumption 4.32W@24VDC

Working environment

Operating temperature 0℃～60℃


Storing temperature -40℃～85℃





9.2.3 Thermocouple measurement module

Model: EDPF-TC8R/EDPF-TC16R/EDPF-TC16

Thermocouple modulating measurement module EDPF-TC8R/EDPF-TC16R/EDPF-TC16 is

mainly used for processing multi-voltmeter thermocouple voltage from field and voltage input

signal s at multi-volt level.

Characteristics

8/15/16-channel thermocouple or

multi-volt signal input

EDPF-TC8R channel 9 as input of

cold-junction compensation

EDPF-TC16R channel 16 as input

of cold-junction compensation

Support disconnection detection


Hardware watchdog

Support hot plug




Technical criteria of thermocouple measurement module

EDPF-TC8R/EDPF-TC15R/EDPF-TC16



Number of detection channels 8/15/16 lines of differential inputs

Signal type Thermocouple (K, E, N, J, T) or multi-volt voltage signal

Range ability ±80mV


A/D conversion accuracy 16 bits

Temperature measurement

range cold junction

compensation

-50～270℃




44




Isolation



voltage

500V

Communication



Power supply

Working voltage 24VDC±5%

Power consumption 4.08W@24VDC

Working environment








9.2.4 Modulating output module

Model: EDPF-AO8/EDPF-AO8D

Modulating output module EDPF-AO8/EDPF-AO8D provides 8-line 4～20 mA signal outputs. It is

mainly used to convert the numerical values of calculations of controller into analog value output

via D/A converter, so as to control the operating mechanism to conduct intended action. After

adding redundant recuperation board, EDPF-AO8D module can realize module and channel

redundant configuration.

Characteristics

8-channel isolated 4～20 mA

output

Redundant current output


Hardware watchdog

Support hot plug




Technical criteria of modulating output module

EDPF-AO8/EDPF-AO8D



Number of channels 8

Range of signal 4～20mA

Output precision 0.1%@25℃,F.S


45

D/A conversion accuracy 16 bits

Thermal transient Max±50ppm/℃

Load capacity (Max) Max.1KΩ@24VDC

Isolation



voltage

500V

Communication

Communication protocol HDLC


Power supply


Power consumption (Max) 11.04W@24VDC (complete circuit output 24V)

Working environment








AO redundant recuperation board



Number of detection

channels

8-line redundant module A voltage input, 8-line redundant

module B voltage input, 8-line select-high current output

Input span 4～20mA

Output range 4～20mA


9.2.5 Current output multi-circuit control module

Model: EDPF-ACT4

EDPF-ACT4 is multi-circuit control module of current output type, with 8 analog input channels

and 4 analog output channels. The performance index of analog input channel is identical module

AI (mA), capable to access current and voltage signals, use two-wire system to supply transducer

directly with configuration mode the same as module EDPF-AI (mA), and the performance index

of analog output channel identical to module EDPF-AO8.

Current output type multi-circuit control module EDPF-ACT4 is mainly used for output regulation

of control circuit, while the analog input channel is used for detection of position feedback of

operating mechanism, and the analog output channel is used for driving operating mechanism.

Each EDPF-ACT4 module can provide 4 independent circuit output controls respectively.


46

Characteristics

8-channel 0～20 mA current

input/0～5V voltage input,

4-channel 4 ~ 20 mA current

output

Two-way sensor/transmitter

working mode


Hardware watchdog

Support hot plug




Technical criteria of current output type multi-circuit control module

EDPF-ACT



Number of detection

channels

8-line current/voltage input, 4-line current output

Range ability Input 0 ~ 20 Ma/0～V, output 4 ~ 20 Ma




D/A conversion accuracy 16 bits

Signal multiplication

times

2


Differential mode

rejection

Superior to 60 dB

Current sampling

impedance

250Ω




Isolation



voltage

500V

Communication



Power supply


Power consumption

(Max)

6.24 W@24VDC (under condition of 16 channels supplied

at 20 mA in the meanwhile)

Working environment




47






9.2.6 Pulse output multi-circuit control module

Model: EDPF-CT4

EDPF-CT4 is pulse modulation output type multi-circuit control module in the EDPF distributed

high-speed smart monitoring and controlling network, realizes the function of 4 servo-amplifiers in

one module, and modulates output impulse signals, so as to position operating mechanism

accurately and in a better way, then achieve favorable control quality of the whole control circuit.

The previous 4 channels of module are AIs (used for inputs of position feedback), and later 8

channels as DOs for output of 4 circuits of depropagation pulsed signal respectively.

For the control principle of circuits, taking one circuit as example, DPU sends control demand

SVX of module CT4 as target value of AI. Two ways of DOs output different status based on the

customized maximum permitted error V1, inertia error V2 (V2 > V1) and input analog amount AI,

so as to control the absolute value of difference between input analog amount AI and normal

value SVX less than V1. CT4 card is mainly applicable to corotation and reverse rotation of motor

depending on control valve positions, so that the value of valve position reaches the industrial

field of set-point. The DO contact current capacity of CT4 card is small, and connected to the

control circuit of motor only through intermediate relay.

It used pulse output control. As compared to modulating output control, the merits mainly reflect

on operating mechanism capable to keep position when module losing power, which can improve

safety feature. In the meanwhile, due to tolerance V1, inertia error V2, impulse duration Tm and

pulse spacing Ts in each circuit of CT4 card can be configured (in signal type domain of DPU

order signal) flexibly and separately, it performs better both in capacity and flexibility than the

traditional servo-amplifier.

For input analog amount AI, A/D collection is unipolar, input range as 10V, and AI including three

input modes: (1) DC voltage signal (2) DC current signal (3) transmitter signal, with specific

configuration method as per later instruction of main-board operations, basicly the same as AI

module.

8-line digital outputs have two modes: ① active output, and ② passive output, and the normal

state of output is normally on.

In addition, CT4 module also has power-fail protective function. When the module is re powered,

output command AO (from DPU) and DO keep the values at power-fail, till initialization completed

and calculation returning to normal. Once initialized, algorithm parameters SVX, V1 and V2 will

not be changed, even after power-fail and repowering, still keep the original value, but only a user

can change its value by sending modification command from upper computer to CT4 card.

In the same way, CT4 module and EDPF monitoring and controlling network have realized rigid

electric isolation, enabled CT4 module at suspended status, and prevented common-ground

interference of various modules and module to network efficiently. The input/output channels of

CT4 module and kernel CPU and peripheral circuit of the same module also have realized strict

electric isolation, ensured CPU capable to work stably for long time under harsh environment,


48

and enabled the upper computer to diagnose field fault and contingency easily.

Characteristics

4-channel 0～20 mA current

input/0～5 V/0-10V voltage input,

8-channel active/passive digital

outputs

Input two-way sensor/transmitter

working mode

Input/output interface isolated to

system electrics

Over-current protection, power

supply reverse protection

Hardware watchdog

Support hot plug


Technical criteria of pulse modulation output type multi-circuit control module

EDPF-CT4



Number of detection channels 4-line current/voltage input, 8-line digital output

Input range Input 0～20mA/0～5V/0～10V,

Measuring precision 0.1%@25℃, full range


Output mode Active or passive optional

Output current restriction 120mA

Contact capacity 1A@24VDC

Switch life 2x10e5 times

actuation/conduction time 3ms

Release/cut-off time 3ms

Signal multiplication times 1 or 2



Current sampling impedance 250Ω




Isolation



voltage

500V

Communication



Power supply


Power consumption (Max) 5 W@24VDC (under condition of 4 channels supplied at

20 mA in the meanwhile)


49

Working environment








Pulse output control algorithm of EDPF-CT4 pulse modulation output type multi-circuit control

module

The built-in servo algorithm module of module decides the outputs of pulse type digital quantity

DO1, DO2 through comparing the output signal of regulator and the position signal of operating

mechanism collected from modulating input. DO1 and DO2 are used for control over corotation

and reverse rotation of motor of operating mechanism respectively. DO1 is used for control over

corotation and increasing position value of feedback; and DO2 is used for control over reverse

rotation and decreasing the position value of feedback. The output algorithm of DO1 and DO2

shall be shown as the following diagram:

Fig. 9-6 Algorithm diagram of EDPF-CT4 pulse modulation output type multi-circuit control

module

Parameter specification

AI: input AI value

SVX: AI normal value, i.e. the AI value to be controlled and reached

V1: maximum error

V2: inertia error, i.e. the error caused by inertia of controller

Tm: impulse duration

Ts: pulse spacing

For different controllers, adjusting V1, V2, T1 and T2 can cause the absolute value of difference

between input value AI and normal value SVX less than V1.

Note: The outputs of DO2 and DO1 shall be eudipleural.

9.2.7 16-line digital input module

Model: EDPF-DI16/EDPF-DIE

DO2

221

DO1 AI-SVX V1

V2

Ts

DO1

Tm


50

EDPF-DI16/EDPF-DIE is digital input module, which can acquire 16-line switching value status in

real time, and record the sequence and time of switching value state events. The resolution of

event time can reach 0.5 ms.

EDPF － DI16 module has lowpass digital filter. For digital quantity bouncing, the cutoff

frequency is 50 Hz, which can eliminate switching value bouncingless than 20 ms effectively.

EDPF － DIE module is the update of EDPF-DI16, and the digital quantity debouncing time is 4

ms. The resolution of event time can reach 0.3 ms.

The interface is insulated with system electrics, so as to prevent various module interfaces from

mutual interference.

16-channel digital inputs are dry contact inputs, and provide over-current and over-voltage

protection and reverse voltage protection, which can prevent module interface from damage in

case of accessing false signals.

EDPF-DI16/EDPF-DIE characteristics

16-line digital input channel

Dry contact input mode

Module power supply: +24VDC,

+48VDC, +110VDC (only for

module EDPF-DI16 (110V))

256 sequential event records

SOE resolution < 1 ms

50 Hz lowpass digital filter/4 ms

debouncing time

Isolation voltage between interface

and system: 1500 V

Interface over-voltage and

over-current,

Power supply reverse protection

Hardware watchdog

Support hot plug


Technical criteria of digital input module

EDPF-DI16



Number of detection channels 16-line digital input

Detection voltage

+24VDC

+48VDC

+110VDC Event recorder 256

Resolution of event time 0.5ms

Bandwith of lowpass digital filter 50Hz

Input response time 20ms

Isolation

Isolation voltage between

interface and system

1500V

Communication



Power supply



51

Power consumption 2.16W@24VDC no-load

Working environment








EDPF-DIE



Number of detection

channels

16-line digital input

Detection voltage +24VDC

+48VDC Event recorder 256

Resolution of event time 0.3ms

Bandwith of lowpass

digital filter

250Hz


Isolation



1500V

Communication



Power supply



Working environment








9.2.8 32-line digital input module

Model: EDPF-DI32

EDPF-DI32 digital input module can acquire 32-line switching value status in real time. It has

lowpass digital filter with cutoff frequency 50 Hz, which can eliminate switching value bouncing


52

less than 20 ms effectively.

The interface is insulated with system electrics, so as to prevent various module interfaces and

interface to field from mutual interference.32-channel digital inputs are dry contact inputs, and

provide over-current and over-voltage protection, reverse voltage protection and strong current

sneaking protection, which can prevent module interface from damage in case of accessing false

signals.

Characteristics



Module power supply: + 24 VDC, +

48 VDC, + 110 VDC

50 Hz lowpass digital filter


and system: 1500 V


over-current


Hardware watchdog

Support hot plug


Technical criteria of digital input module





+48VDC

Bandwith of lowpass digital

filter

50Hz


Isolation



1500V

Communication



Power supply



Working environment








53


9.2.9 Digital input/output module

Model: EDPF-DIO32

Digital input/output module EDPF-DIO32 packs 16-line digital input card and 16-line digital output

card in a metal case to provide 16-line digital input channels and 16-line digital output channels.

The digital input interface of EDPF － DIO32 module has lowpass digital filter, with cutoff

frequency 50 Hz, which can eliminate digital quantity bouncing less than 20 ms effectively.

The interface is insulated with system electrics, so as to prevent various module interfaces from


16-channel digital inputs are stem node inputs, and provide over-current and over-voltage



16-line digital output channels can output 24 V digital quantity signals or dry contact output

optional.

Characteristics


16-line digital output channel


Active output or dry contact output

mode


48 VDC



and system: 1500 V


over-current,


Highly reliable capability of

anti-electromagnetic interference;

Hardware watchdog

Support hot plug


Technical criteria of digital input/output module

EDPF-DIO32


Product model DIO32



Detection voltage

+24VDC

+48VDC

+110VDC (only for module EDPF-DIO32 (110V))

Input filtering bandwith 50Hz


Output characteristic

Output channel 16-line digital output

Output mode +24V



Switch life 2x10e5



54


Isolation


and system

1500V

Communication

Communication protocol HDLC


Power supply



6.24 W@24VDC full load

Working environment








9.2.10 Digital output module

Model: EDPF-DO16

Digital output module EDPF-DO16 has 16-line digital output channels. The interface is insulated

with system electrics, so as to prevent various module interfaces from mutual interference.

16-line digital output channels can output 24 V or 48 V switching value signals or dry contact

output optional.

Characteristics

16-line digital output channel

Active output or dry contact output

mode

50 Hz low-pass digital filter


and system: 1500 V


over-current,


Highly reliable capability of

anti-electromagnetic interference;

Hardware watchdog

Support hot plug


Technical criteria of digital output module EDPF-DO16

EDPF-DO16


Product model DO16

Output characteristic

Output channel 16-line digital output

Output mode +24V



55


Switch life 2x10e5



Isolation



1500V

Communication



Power supply


Power consumption (Max) 1.92W@24VDC no-load

5.52W@24VDC full load

Working environment








9.2.11 8-channel pulsed quantity measurement module

Model: EDPF-PI

EDPF-PI pulsed quantity measurement module has 8 lines of input pulse signal in total. The

interface is insulated with system electrics, so as to prevent various module interfaces from


8-channel pulsed quantity inputs are stem node inputs, and provide over-current and over-voltage



Characteristics

8-line pulsed quantity input channel



48 VDC

Max. 4 * 10 E9 pulse count value



and system: 1500 V


over-current,


Hardware watchdog

Support hot plug


Technical criteria of pulsed quantity measurement module


56

EDPF-PI



Number of detection channels 8-line pulsed quantity input


+48VDC

Maximum pulse counting 4*10E9

Bandwith of lowpass digital

filter

50Hz


Isolation



1500V

Communication



Power supply



Working environment








9.2.12 Steam-turbine speed measurement and over-speed protection module

Model: EDPF-SD1/EDPF-SD3

EDPF-SD is speed measurement and steam turbine protection module used exclusively for

steam-turbine electrohyraulic control system DEH, provides three-way speed measurement,

implements two-out-of-three logic on module, realizes two-out-of-three function, and provides

output signal of over-speed protection. In practical applications, it uses two EDPF-SD in the

meanwhile for hot stand-by redundancy.

Three-way speed signals speed1, speed2 and speed3 are sent to three independent waveform

shaping circuits, amplification module and square-wave producer, and calibrated through

standard time clock before precise calculation of speed value with precision of 0.4 rpm at 3000

rpm. After CPU having calculated three speed values, middle-out-of-three algorithm, the correct


57

speed value is selected for control and protection. In the meanwhile, the module has designed

with sophisticated over-speed protection logic to ensure the reliability and rapidity of over-speed

protection function.

Characteristics

Three-way steam-turbine speed

measurement channel (EDPF-SD1

as one channel)

Three-way oil switch signal input

103%OPC signal output

110%AST (to VC card)/110%AST

(to field) signal output


and system: 1500 V

Hardware watchdog

Support hot plug


Technical criteria of steam-turbine speed measurement and over-speed protection module

EDPF-SD1/SD3


Characteristics of input/output channel

Signal type of rotation speed input Sinusoid of inductive resistance probe,

square-wave of flux-sensitive probe

Maximum rotating speed signal

(peak-peak value)

30V

Minimum rotating speed signal

(peak-peak value)

0.4V～0.8V

Measurable signal maximal rate 7500 rpm

Tooth number of tachometer disk 1～300

Measuring precision of rotation speed

signal

Rotation=3000 rpm,<=0.4 rpm

Speed measurement time Rotation speed <= 200 rpm, two signal periods

Rotation>=200 rpm, 20mS

Digital input characteristics

Input channel 6 lines

Signal type Dry contact

Signal detection voltage 24VDC

Digital output characteristics

Output channel 3 lines

Output signal type 1 line of relay dry contact

2 lines of active 24 VDC

Isolation

Communication isolation voltage 500V


and system

1500V

Communication


58

Communication protocol HDLC, synchronous data transmission,

half-duplex


Power supply



Full load

Working environment








9.2.13 Steam-turbine electric-tuning valve servo module

Model: EDPF-VC

EDPF-VC module is smart servo power amplifier module specially designed for steam-turbine

electrohyraulic control system DEH, and received control demand of controller to drive

electro-hydraulic converter directly after power amplification. EDPF-VC module is integrated with

LVDT signal transducer, implements select-high automatically, forms close circuit of valve

position through internal variable PI regulator, and realizes accurate control over valve position.

Through hyperterminal, it can configure LVDT electric zero point and fullness conveniently to

adjust control parameters. EDPF-VC module takes a full consideration of the compatibility of

fire-resistant oil DEH and turbine oil DEH. The software part of module is completely consistent,

and hardware part just needs to replace output recuperation board based on servo-valve of

different input signal types.

EDPF-VC module provides displacement transducer interface, while the transducer provides

electric signal in linear ratio to displacement and realizes control over oil servo motor.

The output signals of EDPF-VC (three-wire) series module include-10V～+10V,-10mA～+10mA

and 4～20 mA.

EDPF-VC card has general terminal communication interface. A user can configure and check

functions of VC module in Windows hyperterminal software via RS232 communication cable,

including zero point and fullness adjustment, control parameter adjustment.

EDPF-VC card is designed with function of manual operation. When the auto/manual key on

standby manual operation panel is switched to manual, press increase or decrease button and

accelerate button to operate valve directly. The normal increase or decrease speed is 5%/min,

and accelerated increase or decrease speed as 35 %/min. Manual auto tracking VC card in

problem has been considered thoroughly.

When EDPF-VC card judges communication fault of upper computer (host of DPU station) or two


59

ways of LVDTs in fault, EDPF-VC card sends request for emergency manual operation, indicator

"request for manual operation" on standby manual operation panel on, then switch auto/manual

key to manual according to circumstance, and operate the valve directly (operation available in

case of communication fault; when two ways of LVDTs in fault, control valve closed completely).

Characteristics

Three-wire/six-wire LVDT

measurement interface

Single/double LVDT measuring

channel

LVDT sensor automatic fault

detection

Manual/auto switch

Manual increase/decrease

±10V/4～20mA/-10～10mA

modulating output


and system: 1500 V

Hardware watchdog

Support hot plug


Technical criteria of steam-turbine electric-tuning valve servo module

EDPF-VC


Modulating input/output characteristics

LVDT input Three-wire/six-wire

Current transducer input 4～20mA

Valve control signal output ±10V/4～20mA/-10～10mA

Display current output 4～20mA

Displacement detection

precision

0.1%@25℃, F.S


Digital input characteristics

Input channel 5 lines

Signal type Dry contact

Signel detection voltage 24VDC

Digital output characteristics

Output channel 1-way

Output signal type Relay dry contact or active 24 VDC optional

Isolation


voltage

500V



1500V

Communication



60


Power supply



Full load

Working environment








9.2.14 Electric quantity measurement module

Model: EDPF-EM

EDPF-EM module can measure 8-line VAC signals (0～100 V), 8-line AC current signals (0～5 A)

or 16-line AC current signals (0～A) in the meanwhile based on different recuperation modules,

calculate the virtual values, mating voltages, phase angle between currents (power factor) and

voltage frequency. 8-line VAC signals and 8-line AC current signals are one-to-one mating.

Characteristics

16-line 0 ~ 2.91 V VAC input

channel

8-line current, 8-line voltage

measurement (matching with

EDPF-EM (recuperation board))

16-line current (0-5 A)

measurement (matching with

EDPF-EM2 (recuperation board))

Recuperation board converting

field voltage and current signals

through CT and PT isolation

Over-current protection, power

supply reverse protection

Hardware watchdog

Support hot plug


Technical criteria of electric quantity measurement module

EDPF-EM main module



Number of detection channels 16-line VAC input

Range ability 0～2.91V VAC

Measuring precision 0.1%@25℃, full range





61

Sampling rate 16 time every 20 ms

Isolation

Channel isolation voltage >2200Vac


voltage

500V

Communication



Power supply


Power consumption (Max) 5W@24VDC

Working environment








Voltage and current recuperation module EDPF-EM (recuperation board)



Number of detection channels 8-line VAC input, 8-line AC current input

Input span PT 0～100V VAC,

CT 0～5A AC current

Output range PT 0～2.91V VAC

CT 0～2.91V VAC

Measuring precision 0.20 %@25℃, full range

Auxiliary supply ±15V

Isolation voltage >2200 Vac voltage input, > 3500 Vac current input

Service temperature -40～+75℃

Current recuperation module EDPF-EM2 (recuperation board)




62

Number of detection channels 16-line AC current input

Input span CT 0～5A AC current

Output range CT 0～2.91V VAC

Measuring precision 0.20 %@25℃, full range

Auxiliary supply ±15V

Isolation voltage >3500Vac

Service temperature -40～+75℃

9.2.15 ETS protection unit of steam-turbine emergency trip system

Model: EDPF-TPU

The task of ETS system (Emergency Trip System) is monitoring significant parameters of

steam-turbine, and tripping steam-turbine in emergency when exception happens in

steam-turbine. It is a significant safety system of thermal generating unit. ETS system device

needs to be provided with high reliability and high-speed capacity as well as function security and

fault security.

ETS protection unit is the most important component of EDPF-ETS. For the purpose to ensure

function security of EDPF-ETS, ETS protection unit EDPF-TPM is designed for the following

operating modes:

Redundant characteristics

It adopts completely 3-layered redundancy design, which has greatly improved the level of

equipment safety. ETS input/output signals form safe I/O channels through configurable

redundant mode like 2oo3, 2oo4 and 2oo2.

Independent characteristics

It assumes the most important redundant input signal condition of ETS system for judgment and

protection of logic operation and emergency trip output. Any fault in the controller of ETS process

control station has no impact on ETS function of emergency trip.

System features

Complete two-out-of three structure

Protective circuit realized in FPGA, independent from DPU

De-energized tripping: power-losing, voltage-losing, fault tripping

On-line maintenance: any maintenance of 3-layered redundant components, card or relay

replaceable on-line

On-line test: testing tripping circuit in operation (test logic realized in DPU)

On-line diagnostics, fault alarm

Configuring card on-line

ETS protection unit EDPF-TPU is composed of 3 EDPF-TPM modules+ 1 TPU base + 1 TPU

relay panel. Among others, TPU base provides 24 lines of DI channel terminals and 3 DB25

sockets, and TPU relay panel provides 3 DB25 sockets, 3 groups of 2oo3 redundant DC relays

and 9 independent DC relays. Each DI terminal is led to 3 TPM cards via TPU base in the

meanwhile, 3 TPM cards complete the same logic operation and output to relay panel, and to field

via 2oo3 circuit of relay finally.

ETS protection unit EDPF-TPU has 24 lines of 3-layered redundant digital input channels, among


63

others, 5 lines pass the digital output trip channel avoiding act-error or act-refused decided by

2oo3, and 3 lines for alarm output.

Extend of ETS protection unit

Functionally, small steam-turbine has smaller ETS, the required digital input channels < 24 lines,

thus 1 ETS protection unit can complete all protection logic. When ETS has larger size in need of

multiple ETS protection units, each protection unit completes a part of protection logic and drives

all AST valves, and the ultimate output shall be composed of relay output concatenated.

Basic ETS configuration plan

1 cabinet + 2 groups of ETS protection units

EDPF-SD module optional

(Note 1: If DEH sends rotation speed signal to ETS system directly, it is necessary to add SD

card;

Note 2: For the purpose to realize 2oo3 redundancy, it is necessary to use 3 SD cards in the

meanwhile;

Note 3: EDPF-SD module is the module of speed measurement and steam turbine over-speed

protection.)

Available to add other types of cards like DI16, AI (note: depending on engineering design)

DI points for logic like test point and first exit point shall be led in DPU via card DI16 and

completed through soft logic.

ETS configurations under different demands

Each ETS protection unit provides 24 lines of DI channels, thus the number of DI hard-points

demanded for trip logic necessary to be completed in TPM card has decided how many ETS

protection units demanded. If DI < 20, 1 ETS protection unit can be configured; if 20 < DI < 40, 2

ETS protection units can be configured (DI channel demanded for ETS trip logic of Harbin

Turbine 600 MW steam-turbine is about 40 points, thus 2 ETS protection units are listed as the

basic configuration of ETS system); if DI > 40, 3 ETS protection units can be configured. Due to

the particularity of ETS, the highest configuration shall be 4 ETS protection units.

Multiple redundant thorough protection

2oo3 and 2oo4 logics

Signal 2oo3, as shown in panel:

信号1

信号2

信号3

与

与

与

或

Fig. 9-7 Signal 2oo3

Signal 2oo4, as shown in panel:


64

信号1

信号3

信号2

与

或

信号4

或

Fig. 9-8 Signal 2oo4

Relay output 2oo3 is established with DC relays of 3 double-contacts on relay panel, as shown in

panel:

R1-1

R3-2

R2-1

R1-2

R3-1

R2-2

注：R1-2表示第1个继电器的第2对

触点，其余类推

Fig. 9-9 Relay output 2oo3


65

Chapter X Fieldbus technology of EDPF-NT

10.1 Technical points of EDPF-NT fieldbus

10.1.1 DCS and fieldbus seamless integration technology

Multiple fieldbus devices can be switched in the controller of EDPF-NT system procedure control

station through standard access platform to participate in real-time control strategy, and assign

partial control functions to fieldbus devices in the meanwhile. Uniform data information

description method has ensured identical data information flow.

A transparent channel of administration information is provided in DCS controller, which enables

the fieldbus equipment management workstation to manage fieldbus devices over controller,

configure various fieldbus measuring points and control logic uniformly with DCS configuration

software and realize the function of seamless integration.

10.1.2 Multiple fieldbus protocol conversion module

Based on software and hardware technology of fieldbus protocols with independent intellectual

property, protocol conversion technology of multiple fieldbus has been researched to develop

relevant fieldbus protocol conversion module with redundant functions, and realize seamless

integration of smart instruments compatible with FF, PROFIBUS, EPA, MODBUS and HART

protocols in EDPF-NT system.

10.1.3 Comprehensive management software of fieldbus smart and non-smart devices

Based on FDT/DTM fieldbus equipment management international standard, a user can

manage multiple fieldbus smart instruments and general instruments with the same user interface

and mode.

10.2 Fieldbus access plan of EDPF-NT system

10.2.1 Standard fieldbus access platform

The latest generation of controller of EDPF-NT has integrated the Extend I/O bus (EIO)

developed by Beijing GuoDianZhishen Control Technology Co., Ltd. independently, which can

supports seamless access of third-party control systems and instruments adopting various

fieldbus protocols thoroughly.

EIO bus of industrial Ethernet frame and various fieldbus protocol conversion modules are

connected to form standard fieldbus access platform. Protocol conversion modules serve as

master station, and connect fieldbus slave station devices through the fieldbus interfaces.EIO bus

also provides transparent connection channel between fieldbus devices and upper computer

network.

Pure digital fieldbus information and conventional I/O signal are converted into EIO information

through protocol conversion module respectively. EIO network can access one or more

controllers to form a distributed control unit (DPU).

Introduction of EIO fieldbus access platform has blended two categories of I/O bus technology.

One category is multiple types of fieldbus (e.g. FF, PROFIBUS DP/PA, EPA and HART, etc.),

while the other as traditional I/O bus.

Standard fieldbus devices and I/O subsystem of IOBUS bus access EIO through protocol

adaptation module.


66

EIO network can access one or more controllers to form a distributed control unit (DPU).

Any a pair of controllers on EIO bus can be assigned to form an independent logical

sub-network with access system. Multiple logical sub-network form EDPF-NT procedure

level fieldbus technical platform.

Fig. 10-1 Fieldbus access platform of EDPF-NT

10.2.2 Multiple connection schemes of EDPF-NT and third-party control systems

10.2.2.1 Fieldbus interface with traditional IOBUS bussing technique

Process controller DPU hitches EDPF-COM module through redundant IOBUS bus to provide

IOBUS procedure level fieldbus interface.

EDPF-COM module is an IOBUS bus communication interface adapter installed on

general I/O base. It supports various fieldbus communication protocol. The module is

designed with 2 insulated serial RS485 communication interfaces and a programming

interface. The default communication protocol is Modbus RTU with maximum

communication rate of 19200 BAUD. The rate of information transmission ensures digital

quantity no less than 8000 points/second, and analog quantity no less than 1000

points/second. The data handling capacity of each EDPF-COM is 1000 records.

10.2.2.2 Ethernet-based communication: communication protocol as Modbus over TCP/IP.

Third-party control system supporting Ethernet communication protocol, e.g. PLC controller, can

be hitched on EIO bus directly. If the third-party systems are more than one, network switch can

be used to construct EIO bus network. Any a pair of process controllers on EIO bus can be

assigned to form an independent logical sub-network with 1 or more third-party control system

equipment. Usually, controller establishes procedure level communication relationship as

themaster station of this sub-net with the slave stations of various third-party control systems in

the logical sub-net. Multiple logical sub-networks form EDPF-NT procedure level fieldbus

technical platform.

10.2.2.3 serial-port-based server communication: communication protocol as Modbus RTU.


67

DCS acts as handover interface with third-party systems through serial-port server. One end of

serial-port server connects EIO bus through Ethernet, and another end connects third-party

control systems through RS485 or RS232 interface. Serial-port server usually has multiple

connection ports, which each port connects 1 to 16 third-party systems.It can connect multiple

third-party control systems or fieldbus instruments in the meanwhile. Any a pair of process

controllers on EIO bus can be assigned to form an independent logical sub-network with several

third-party control system equipment hitched on serial-port server to form procedure level fieldbus

communications system.

10.2.2.4 FF, BROFIBUS and HART fieldbus communication

Multiple fieldbus devices can be linked to EIO bus of DPU controller through protocol conversion

module with redundant functions to participate in real-time control strategy, and assign partial

control functions to fieldbus devices in the meanwhile.Uniform data information description

method has ensured identical data information flow.

The aforesaid four types of fieldbus device access schemes are designed with EIO function

module in process control station controller liable for fieldbus communication control and

management, and the information transmitted in one-to-one relationship with channel data of

virtual I/O modules in controller. All communication data can be processed as standard I/O data

as standard procedure level fieldbus communication plan.

10.2.2.5 Structuring high-capacity data communications gateway with EIO technology

EDPF-NT GATEWAY is a data communications gateway of large handling capacity, dedicated to

implement real-time telecommunications with high-capacity third-party control systems. This

GATEWAY can support multiple standard bus communication protocols and provide

multi-channel data transmission. Working station has built-in virtual controller, establishes

communications linkage with large-capacity third-party control system equipment through EIO

technology, converts gateway information into DCS standard data structure, and provides I/O

data processing capacity. The data handling capacity is more than 10000 points.

EDPF-NT GATEWAY is system information level data communications gateway featured as

powerful functions and high data handling capacity, suitable for intelligence transmission of hard

intensity with third-party systems.

Redundant configurations of EDPF-NT like EIO technical support fieldbus network segment, EIO

network segment, protocol transition card have ensured its high reliability and availability

sufficiently.

10.3 PROFIBUS fieldbus access schemes

Profibus fieldbus standard is matured and stable with high signaling speed, large bus capacity,

fast response speed, plenty matured products and suitable for application in thermal power

station.

Shown in the figure, EDPF-NT process control station controller (DPU) connects to PROFIBUS

protocol conversion module (NT300-PB) via EIO bus, and protocol conversion module NT300-PB

connects Profibus-DP slave stations via 4 sectional interfaces, each section available for 32

devices of slave station.Its frame diagram shall be shown as following:


68

DPUEIO

PROFIBUS

PROTOCOL

CONVERTER

PORT0

PORT1

PROFIBUS

DEVICE

PROFIBUS

DEVICE

PROFIBUS

DEVICE

PROFIBUS

DEVICE

BACK PORT

BACK PORT

Fig. 10-2 Profibus protocol conversion module

10.3.1 Performance index of PROFIBUS protocol conversion module NT300-PB:

Compatible with Profibus-DP protocol standard, support all rates of Profibus-DP from 9.6 k to

12 Mbits/s

Compatible with IEC61158 PROFIBUS-DP V0 and V1 protocol standard.

Provide 4 cable ports and 2 optical ports, available with 6 sections of capability directly. More

branches expandable through bus splitter.

Each DP module can connect 120 standard slave station devices directly, and the scanning

period of each bus device is less than 1 ms @ 1.5 Mbps.

Built-in fiber optical module, convenient for remote transmission.

Communication rate from 9.6 kbps to 12 Mbps.

10.3.2 PROFIBUS fieldbus system configuration schemes

Fig. 10-3 Profibus fieldbus system configuration schemes


69

10.4 EDPF-NT fieldbus equipment management software

10.4.1 Outline

EDPF-NT fieldbus function permits to use

extensive fieldbus devices. Currently, there

are more than 100 manufacturers of fieldbus

instruments and devices capable to

coordinate with EDPF-NT system, with

thousands of different types instrumental

equipment and multiple communications

protocols concerned (e.g. HART and

Profibus).

EDPF-NT must provide a simply and ease-of-use fieldbus device integration management

platform facing equipment erection and maintenance engineer. This fieldbus equipment

management platform shall be capable to integrate various fieldbus instrumental equipment

conveniently and promptly to realize transparent data access. It provides standardized work

interface and project tools for fieldbus instrument and equipment management, operations and

verification independent from device type, supplier and protocol.

EDPF-NT fieldbus equipment management software is a fieldbus device integration and

management platform based on FDT/DTM frame.

Field Device Tool (FDT) is a standard interface specification, and provides an open and

standardized integration and management platform basis independent from various smart

fieldbus instrumental equipment. The exclusive fieldbus equipment drive software or device type

management software DTM compiled by various manufacturers are organized in a single FDT

framework structure application. Each smart instrument DTM will provide all descriptive

information of this device, including configuration dialog box, parameter configuration and

Troubleshooting.

EDPF-NT fieldbus equipment management software has integrated all wired fieldbus smart

instrument drives or device type management software DTM with the help of FDT technology to

provide a standardized fieldbus equipment management platform for users, and the customer

engineer of EDPF-NT can manage all fieldbus instruments conveniently and easily.

Fieldbus equipment management software FDT (Field Device Tool) based on FDT/DTM standard

connects multiple communication protocols to a simply and ease-of-use user platform, and

integrates DTM developed by equipment manufacturer into framework applications as a software

module. FDT standardizes the data exchange mode between communication controls of field

device and control system.

FDT technology includes three elements: framework application, equipment DTM and

communication DTM/gateway DTM. Framework application is open software. Equipment DTM is

compiled and supplied by equipment developer. Communication DTM/gateway DTM software is

provided by system developer or gateway manufacturer.


70

DPU01

DPU08

IP:192.168.0.8

端口号：8080

DPU31

. . . . . . . . . . . . .

. . . . . . . 卡件地址X:

Profibus协议转换

卡

卡件地址Y

地址1 地址2 地址6

地址126

. . . . . . . . . . . . . .

共126个地址

工程师站

FDT/DTM应用框架IP:192.168.0.101

端口号：8080

网络

HDLC协议

FdtCONTAINERFdtCONTAINER

My Network

COMMDTM:01

COMMDTM:08

COMMDTM:31

GATEWAYDTM: X

ProfibusDeviceDTM:

01

ProfibusDeviceDTM::

02

ProfibusDeviceDTM::

126

FileEdit View

Fig. 10-4 Block diagram of equipment management software

Based on fieldbus functional design of EDPF-NT system, EDPF-NT engineer station/fieldbus

instrument administrative station shall install FDT framework application, equipment DTM,

communication DTM and gateway DTM software. EDPF-NT process control station controller

shall install relevant communication DTM drive software. Fieldbus protocol conversion module

shall install gateway DTM drive.

For a Profibus application, the fieldbus management software on engineer station shall pass

gateway DTM and communication DTM on engineer station in turn through request sent by

PROFIBUS equipment DTM, which is transmitted to relevant process control station DPU via

EDPF-NT data highway, then sent to EIO bus via communication DTM after DPU processing,

arrives PROFIBUS protocol conversion module, and finally is sent to PROFIBUS equipment of

assigned address via gateway DTM drive software on PROFIBUS protocol conversion module.

The responses returned from equipment PROFIBUS shall also pass the following flow in turn:

PROFIBUS equipment → gateway DTM on PROFIBUS protocol transition card →

communication DTM on DPU → communication DTM on engineer station → gateway DTM →

equipment DTM, and finally displayed via equipment DTM software in fdtCONTAINER

framework.

Communication DTM hardware installed on DPU shall be liable for receiving the request on

network sent from FDT, sending to PROFIBUS protocol transition card after processing, then

sending the responses received from PROFIBUS protocol transition card to FDT after

processing.

Gateway DTM hardware drive installed on PROFIBUS protocol conversion module shall be liable

for forwarding DPU command to PROFIBUS equipment, and forwarding responses returned from

PROFIBUS equipment to DPU.

10.4.2 Primary functions of EDPF-NT fieldbus equipment management software

Scanning, recognizing equipment and

updating information

Equipment management in zones

Equipment diagnosis and alarm

monitoring

Equipment parameter configuration and


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monitoring

Verification management

History and configuration record

management

Equipment document management

Security and authority management

Addition support to general instruments

10.4.3 Examples of primary functions of EDPF-NT fieldbus equipment management

software

Fig. 10-5 Management interface of E + H temperature transmitter Fig. 10-6 Management of

ROTORK fieldbus operating mechanism

10.4.4 Configuration of EDPF-NT fieldbus equipment management software

10.4.4.1 Profibus equipment management software

Profibus equipment management software realizes multiple connection types, convenient for

users to connect and debug Profibus fieldbus instrument under various circumstances. All

connection types support real-time communication running of equipment DTM.

10.4.4.1.1 Direct connection

This mode is convenient for users to debug fieldbus instruments before all DCS configurations

completed.By this time, communication DTM of fieldbus management workstation established

connection with various Profibus protocol conversion module EDPF-PB directly through DCS

data highway. For this mode, it only needs to assign the IP address and communication port of

target Profibus EDPF-PB card with connection type as shown in figure:

PROFIBUS

EDPF-PB 卡

1 2 5

125

. . . . . . . . . . . . . .

最多126个设备

工程师站


端口号：8080

网络

UDP协议


My Network

COMMDTM:01

COMMDTM:08

COMMDTM:31

GATEWAYDTM: X

HartDeviceDTM:01

HartDeviceDTM:02

HartDeviceDTM:08

FileEdit View

Fig. 10-7

10.4.4.1.2 DPU connection through process control station controller

This mode is compatible with EDPF-NT, except for communication DTM, and adding primary

gateway DTM. This communication DTM is connected to DPU through choosing domain No. and

operator station, send s data to Profibus EDPF-PB card via DPU forwarding, and communicates


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with real slave station, as shown in figure as follows. This mode needs not to know the IP address

of target Profibus EDPF-PB card, merely configuring point names of domain number, station

number and slave station. This mode is applicable to regular operation after configuration and

debugging completed.

DPU01

DPU08

IP:192.168.0.8

端口号：8080

DPU31

. . . . . . . . . . . . .

. . . . . . . PROFIBUS

EDPF-PB 卡

1 2 5

8

. . . . . . . . . . . . . .

最多126个设备

工程师站


端口号：8080

网络

UDP协议


My Network

COMMDTM:01

COMMDTM:08

COMMDTM:31

GATEWAYDTM: X

HartDeviceDTM:01

HartDeviceDTM:02

HartDeviceDTM:08

FileEdit View

Fig. 10-8

10.4.4.2 HART bus equipment management software

Communication of HART bus equipment management software is compatible with EDPF-NT with

connection type as shown in figure. Request of HART equipment DTM on fieldbus administrative

station passes gateway DTM and communication DTM in turn, then is sent to communication

DTM driver of process control station controller DPU via EDPF-NT data highway. DPU controller

adopts IOBUS bus of HDLC protocol to send this request to HART protocol transition card, and

finally to HART card of assigned channel via HART protocol transition card. The responses

returned from HART card shall also pass the following flow in turn: HART card → HART protocol

transition card → DPU → communication DTM of engineer → gateway DTM → equipment DTM,

and finally displayed in fdtCONTAINER framework.

DPU01

DPU08

IP:192.168.0.8

端口号：8080

DPU31

. . . . . . . . . . . . .

. . . . . . . 卡件地址X:

HART协议转换卡

卡件地址Y

通道1 通道2 通道5

通道8

. . . . . . . . . . . . . .

共8个通道

工程师站


端口号：8080

网络

HDLC协议


My Network

COMMDTM:01

COMMDTM:08

COMMDTM:31

GATEWAYDTM: X

HartDeviceDTM:01

HartDeviceDTM:02

HartDeviceDTM:08

FileEdit View

Fig. 10-9


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After configurations of HART communication DTM and gateway DTM completed, add relevant

equipment DTM, and capable to communicate with HART equipment in real time.

10.5 Summary

Plenty application practices have indicated that EDPF-NT has been exactly provided with the

capability of full-open fieldbus seamless connection.

EIO technology has provided standard platform of fieldbus access.

PROFIBUS protocol adaptation module has provided well-behaved PROFIBUS procedural

interface.

New I/O modules have provided HART bus protocol support.

Fieldbus equipment management software based on FDT/DTM standard has provided the

function of fieldbus equipment management.

Fieldbus technology is growing matured in technical application specifications in large-scale

thermal power units, and the advanced fieldbus technology of EDPF-NT will play a vital role in

this new technological revolution.


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Chapter XI Other principal hardware units of EDPF-NT

11.1 Industrial network switch

Information isolation and interconnection among EDPF-NT domains is realized with the advanced

and matured network information control list (ACL) technology. The concept of ACL (access

control list) is to use packet filtering technique, read information in packet heads of layer 3 and

layer 4, e.g. source address, destination address, source port and destination port, filter packets

based on the predefined rules, and realize the purpose of access control.

Nodes in DCS system network can be distinguished into resource node and control node in

general, among others, resource node provides data and receives commands, and control node

accesses data of resource node and sends commands. The function of ACL is to protect resource

node on one hand, so as to stop illegal access to resource node, and restrict the access rights of

certain control node on the other hand.

Generally speaking, ACL technology can permit the information of utility system DCS and various

unit DCS communicated, and isolating communication of different unit DCS effectively in the

meanwhile.

Fig. 11-1 Comparison of topological diagrams of network communication before and after

technology enabled (laboratory data)

Note: Right side of Fig. (1) is the effect after using ACL technology, which has isolated all data of

domain 2# effectively.

EDPF-NT system data communication adopts network multicasting technology, i.e. Internet

Group Management Protocol (IGMP). Currently, IGMP has three main versions: IGMPv1

(RFC1112), IGMPv2 (RFC2236), IGMPv3 (RFC3376). IGMP multicasting membership

management system is designed against layer 3, which realizes control over multicasting

message forwarding on layer 3 router. For the purpose to adapt to the multicasting application of

layer 2 switching equipment, IGMP-Snooping monitoring system is introduced. Because

EDPF-NT network has no layer 3 equipment, i.e. router (slow data forwarding of router fails to

satisfy the requirement of instantaneity), layer 2 switch is necessary to support IGMP protocol

separately. However, various switch manufacturers have slight difference in supporting the

realization method in this multicasting environment without router. When the developing

laboratory of Beijing GuoDianZhishen Control Technology Co., Ltd. tested, it has been found that

certain well-known imported brand network switch run a period of time and multicasting


75

forwarding failed.In case of without functionality test of interconnection and intercommunication in

laboratory or long-term stability and reliability demonstration at project site, adopting these

imported network switches without due consideration may appear unpredictable problem of

compatibility, result in unstability of DCS system, and then impact on reliable operation of units.

Fig. 11-2 Comparison of load diagrams of network communication before and after IGMP

enabled (laboratory data)

Note: Right side is the effect after using IGMP technology, which has reduced network load

effectively.

The network switches recommended by Beijing GuoDianZhishen Control Technology Co., Ltd.

have undergone long-term rigorous network system test, and the product technology of these

network switches has been proved with high maturity, good reliability, and complete compatibility

with the new network technologies to be used in EDPF-NT system.

EDPF-NT works at industrial field for long time, thus it has special requirements on type selection

of network switch:

Choose industrial network switch.

Network switch adopts double 24 VDC power supplies, free of mechanical cooling fan,

communication port available for modular configurations, fair tolerance to adverse working

environments, e.g. high-temperature, dust, moisture and electromagnetic interference. Rack

or shelf mountable.

Network switch has function of network administration, and supports IGMP multicasting and

ACL access control list. IGMP multicasting and ACL access control list technologies are

important supporting technologies for realization of EDPF-NT multiple domain network

management function.

Network switch has high price performance with plenty achievements in industrial

application.

11.2 EDPF-NT exclusive power supply quick switch device

EDPF-NT system power supply cabinet is equipped with QPS double-circuit AC undisturbed

automatic switch device designed and produced by this Company independently. It is mainly

aimed at industrial automatic system application with high requirements and reliable supply of

single-phase AC220V and load-carrying capacity 8-20 A. QPS series of redundant power switch

device adopt all-digital AC sampling and moving window detection technology, which can monitor

the poled primary/standby AC power supplies in real time. When two ways of input power


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supplies are both in normal status, the output is connected to the main power automatically.

When the main power occurs power-fail or the voltage is lower than 200 V or higher than 250 V or

the voltage of stand-by power is higher than 200 V, it will be switched to the stand-by power

automatically under action of internal control. The switching time shall be less than 10 ms. After

the primary power supply resumes power supply, and the voltage is higher than 210 V, it can

switch back to the primary power supply automatically and quickly. This device is also designed

with two ways of AC power supply monitoring windows to monitor the AC voltages visually.

QPS redundant power switch device is designed exactly in concordance with strict industrial

environment. The control kernel adopts single-chip (MCU) control device, which ensures the

working process free from contingencies with particular hardware logic, e.g. system crash or

program runaway. And this device can resist 4 KV pulse train and surge impact, 8 KV static

discharge (15 KV air discharge) with interference-free feature reaching international standard

IEC61000-2004-level 4, and run in various bad industrial field environments for long time.

Fig. 11-3 QPS redundant power supply quick switch device

The most imported universal power supply switching devices are applicable to significant

commercial and industrial power supply instead of used for computer-control system equipment

exclusively, thus there is the problem of anti-interference ability and index matching, impossible to

ensure complete matching with EDPF-NT.

Beijing GuoDianZhishen Control Technology Co., Ltd. promises that all indexes of QPS

double-circuit AC undisturbed automatic switching device have satisfied and surpassed the

requirements of industrial automation system technology, and provides total quality assurance.

Technical parameters of QPS series of redundant power supply quick switch device

QPS series of redundant power supply quick switch device

Parameter value:

Max. rated voltage 250VAC

Action voltage Action voltage: < 200 VAC or > 250 VAC

Recovery voltage >210VAC

Switching time 5ms--13ms, typical 10ms

Including, testing time 2ms--6ms

Including, action time 3ms--8ms

Voltage measurement

precision 2%

Recovery delayed time 100ms


77

Interface parameters:

Input AC220VAC：AC1 (primary), AC2 (standby)

Output AC220VAC: OUT1, OUT2, OUT3, OUT4, OUT5

Alarm ALARM (dry contact 120mA/350V)

Control extending port CTRL-OUT (AC220VAC/120mA)

Insulating resistance ＞1 G Ω (1000 V)

Anti-interference level Class 3

Static discharge interference

immunity 6000 V Class 3

Electrical fast transient pulse

train interference immunity 2000 V Class 3

Surge interference immunity 2000 V Class 3

Pulsed magnet field

interference immunity 1000A/M

11.3 Exclusive DC power supply

Exclusive DC power supply is used to provide redundant DC supply for controller, smart I/O

modules, field transmitter and switching value query at EDPF-NT process control station. This

power supply receives two ways of independent 220 VAC power inputs, provides two ways of

independent 24 VDC/48VDC power supplies, and has functions of power failure indication and

power supply short-circuit protection. Among others, 48 VDC power supply os used for switching

value status query exclusively.

Fig. 11-4 Legend of exclusive DC power supply


78

Chapter XII EDPF-NT type DEH system

Beijing GuoDianZhishen Control Technology Co., Ltd. is engaged in design and production of

sophisticated and first-class digital steam-turbine electrohyraulic control system compatible with

function requirements of application for a long time. The Company has an experienced team of

design and debugging. Various digital steam-turbine electrohyraulic control systems designed

and produced (DEH/ETS, MEH/METS) have found wide use. Our DEH/MEH has outstanding

achievements of hundreds of project applications not only as a functional subsystem of DCS but

also as exclusive matching product in large-scale steam-turbine station.

12.1 DCS-integrated DEH

12.1.1 Configurations of DEH electronics and outline

EDPF-DEH is one of exclusive subsystems in EDPF-NT, based on the powerful supporting

environment of EDPF-NT, adopting the software, hardware and communication system identical

to EDPF-NT process control station, adding DEH-dedicated software and hardware, configuring

the system processing cyclic into 20 ms fast processing mode based on special demand of DEH,

and shape a unique EDPF-DEH electric control system.

Adopt redundant controller identical to EDPF-NT process station, fast switching speed of

primary/standby controllers, safe and reliable, maximum control cycle of system less than 30

ms, higher control precision.

MMI and configuration software identical to EDPF-NT exactly, easy-to-learn, ease-of-use,

and ease-of-maintenance.

Real-time database exactly integrated with EDPF-NT.

Data communication system identical to EDPF-NT to ensure non-delay of data transmission,

unnecessary to provide gateway, realizing integrated distributed control system of unit in

deed.

Function integrated, smart speed measurement and OPC function module enabling speed

measurement cyclic and OPC action time as short as 20 ms and 2 ms respectively. Smart

servo shall power amplifier module providing more compact and reliable system.

All application operations of digital steam-turbine electrohyraulic control system (DEH/MEH)

are realized on EDPF-NT operator station to control operation of steam turbine through

window panels on computer and mouse, which has canceled traditional operation panel of

steam turbine to provide merits of flexible operations, friendly MMI and rich monitoring

information. The hardware is safe and reliable, easy-to-configuration and convenient for

maintenance.

12.2 Technical requirements of EDPF-DEH control system

Range of speed control 50-3500 rpm. Under rated condition, the speed fluctuation range

caused by rotary speed control shall be not larger than 0.1 % of the rated speed.

Load control range 0-110 %. Under rated condition, the power fluctuation range caused by

power control shall be not larger than 0.5 % of the rated power.

Rotation speed diversity factor continuously adjustable 3-6 %.


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System stagnant rate ≤ 0.06 %.

Full-load shedding rotation speed overshooting ≤ 7 %.

Full travel quick closure time of oil-driven machine ≤ 0.15 second.

System control turnaround time ≤ 50 ms.

DEH even continuous failure-free operation time ＞ 8000 hours, electric control device ＞

20000 hours.

System availability factor ＞ 99.9 %.

12.3 EDPF-NT system speed measurement card

12.3.1 EDPF-SD steam turbine speed measurement and over-speed protection card

1 SD card accesses 3 lines of rotation speed signals in the meanwhile. System requires 2

redundant SD cards, while 3 lines of rotation speed signals and 3 lines of oil switching signals

access 2 SD cards in the meanwhile via transferring terminal row. For the purpose to avoid signal

interference from transferring terminal row to connectors of SD card, the signal cable from

transferring terminal row to SD card shall be twisted pair. Wiring of oil switch signals from

transferring terminal row to SD card shall be ensured with consistence.

SD cards are used, and the selection logic of 3 lines of rotation speed signals shall be completed

on SD card. The rotation speed chosen by two SD cards shall be subject to select-high in

controller as the final rpm value. 3 lines of oil switch signals shall be subject to 2-out-of-3 logical

decision on SD cards before sending effective oil switch signals. OPC and AST operation signals

of two SD cards are outputted as final action after logic decision.

EDPF-SD card has protective function featured as accurate and fast response and output.

12.3.2 EDPF-SD1 card

1 SD1 card accesses 1 line of rotation speed signal. The system is usually equipped with 3 SD

cards, while each SD1 card accesses 1 line of rotation speed signal and 1 line of oil switch signal.

SD1 cards are used. 3-line rotation speed signal selection logic is completed with 3 algorithm in

controller. OPC and AST operation signals of 3 SD1 cards are finally outputed after 2-out-of-3

logical decision with intermediate relay.

12.3.3 Relationship about oil switch and OPC

For OPC function of EDPF-SD speed measurement and steam turbine protection card, if acting

when oil switch turning from closed to disconnected, it is necessary to consider the unit load at

moment of stepout. Specifically, there is an internal point of LDA on speed measurement card

(sent to speed measurement card from DPU controller). When the status of this point is 1, oil

switch turns from closed to disconnected, and speed measurement card OPC will act. Currently:

the specific method shall be as follows: conduct upper bound judgment on unit load (limitation as

15％～20％of rated load), and judgment result outputted LDA signal to each speed measurement

card through TIME OFF algorithm (time as 2S). For speed measurement card before 2004, when

oil switch turns from closed to disconnected, OPC acts immediately instead of confined by load

condition.

The method to inspect the relationship between oil switch and OPC in DEH system under

operation if limited by load condition shall be as follows: inspect system if having generated LDA

point to speed measurement card, and if existing relevant logic; conduct static test under halt

condition for further verification.


80

12.3.4 About signal "rotation speed configuration larger than constant"

Speed measurement card needs the controller to send a signal "rotation speed configuration

larger than constant". When "rotation speed configuration larger than constant" is false (i.e.

rotation speed configuration lower than constant), speed measurement card will not conduct

judgment on lower bound limitation or change rate overbound when judging the quality of all lines

of rotation speed signals. The constant which in "rotation speed configuration larger than

constant" is generally set about 1000rpm. Speed setting refers to the speed setting value that will

participate in speed adjustment PID operation eventually.

12.4 About EDPF-NT system valve control card

12.4.1 VC card output signal type

Currently, there are 3 types of VC card output signals of EDPF system:

－10V～＋10V： mainly used for fire-resistant oil DEH and MEH systems.

4～20mA and －10mA～＋10 mA： mainly used for turbine oil DEH and MEH systems. Attention

shall be paid to verify the control signal type of electro-hydraulic converter of different

manufacturers. Currently, there are certain products using AO card to output 4～20 mA for

control.

12.4.2 VC card LVDT type

Currently, VC card LVDT type of EDPF system mainly includes sensor signal of three-wire system

and transmitter signal of 4～20 mA system in double-circuit. It can also provide VC card using sensor

signal of six-wire system in single circuit.

12.5 1000 MW ultra-super-critical steam-turbine electrohyraulic control system

1000 MW ultra-super-critical steam-turbine electrohyraulic control system (DEH) is the commanding

point of control system technology generally accepted in industry of thermal control field. Because the

requirements of control target are extremely rigorous, it is always supplied by foreign manufacturers.

This Company cooperates with Shanghai Turbine Station in development of independent 1000 MW

ultra-super-critical turbine DEH. Currently, the development of system platform has be completed, the

applications are being configured. The main technical parameters shall be:

Speed measurement card of Hall probe to realize precise zero-speed monitoring;

Speed measurement cycle of speed measurement card shortened to 5 mS, having improved the

capability of quick-response to speed change;

Redundant configuration of control valve servo-card, standby card output tracking,

primary/standby cards output driving corresponding servo-circles respectively, so as to ensure

output co-rotating and undisturbed switching;

Double I/O bus high/low speed configurations to ensure the response cycle of rotary speed

control less than 40 mS.


81

Chapter XIII DCS monitoring software based on WEB

technology

When coordinating with DCS, Web monitoring system acts as enhancement module of DCS to

provide Web interface for DCS so as to satisfy the demand of various remote accesses.

DCS monitoring software based on WEB technology is formed as follows:

Web server, a computer system supporting operation of Web monitoring and control system.

Multiple CPU frameworks, including X86, ARM and Power, using Windows/Linu operation

system.

Web client-end, without any restriction on CPU framework or operation system, only if capable to

run browser for access. The screen size and resolution of different hardware units are different.

For the purpose to reach nice experience of interaction, it is necessary to design different UI

schemes based on specific circumstances.

Mobile APP, Web monitoring system can be compatible for access of mobile APP like

mobile-phone.

Database, to provide simple underlying database and share real-time historical database with

DCS.

DCS monitoring software based on WEB technology has advantages as follows:

Cross-platform. Monitoring interface developed with Web technology can run in any environment

capable to run browser, including various smart devices like IPC, laptop, tablet PC and

mobile-phone. There is no limitation to operating system environment, which may be

Windows/Unix/Linux/iOS/Android.

Advanced technology. Web technology is one of the computer display technologies with the

fastest development in the last 10 years.

Ease-to-deployment and management. In Web technology, all programs in need of management

and deployment are concentrated on server, can be updated and maintained easily.

Good expandability. Web technology is provided with nice elasticity inherently, easy of expansion,

convenient for later maintenance and upgrading; also can be integrated with other Web systems.

DCS monitoring software based on WEB technology has primary functions as follows:

Monitor production processes in working environments with browser installed (computer, PAD,

mobile-phone), including status of equipment and various production parameters.

Send commands to operating mechanism, implement authorization control and intervention of

production process.

When the system occurs abnormal situation, it will issue alarm to remind users for prompt

attention.

Query the history conditions of production process, so as to facilitate failure handling and

problem analysis.

Query records of user operation.

Complete auxiliary tasks like reporting and drawing tendency chart.

Operation authority management of operators, who can not implement operations other than

authority.

Web functional function block of EDPF-NT mainly has two application scenarios:


82

Support development of wind power controller to shape wind power monitoring software.

Channel intelligence test system of DCS module.

Routine I/O channel test needs at least two technicians holding interphones at I/O terminal

cabinets of DCS engineer station and process station respectively. Observe channel quality on

display of engineer station through loading measuring signal.

New testing tool merely needs one technicians holding Pad or mobile-phone at I/O terminal

cabinet of process station to observe channel quality through Web page.


83

Chapter XIV EDPF-CP Industrial Automation System

EDPF-CP is a new industrial automation system developed by Beijing GuoDianZhishen Control

Technology Co., Ltd. In addition to inheriting the superior characteristics of EDPF-NT system

thoroughly, this system also has universal function and capacity of PLC. The characteristics shall

be as follows:

New industrialized design, small size, aesthetic appearance. Flexible installation method can

support support frame horizontal installation and terminal module integrated vertical installation in

the meanwhile.

Twin-engine controller pioneering at home and abroad, provided with merits of PLC and DCS in

the meanwhile, supporting various application environments of industrial automation

comprehensively.

Support SAMA chart control configuration of DCS and 5 standard programming languages of

61131-3.

Twin engine controller kernel software compatible for PLC and DCS.

EDPF-CP built-in PLC and DCS dual-control engine, integrating the merits of digital quantity of

PLC controller with good instantaneity, high reliability, simplicity and ease-of-use as well as

features of DCS analog quantity with powerful processing capacity, strong network function and

rich control algorithms.

As compared with each other, PLC and DCS controllers have their own relative merits

respectively. Comparison shall be as follows:

Features of PLC controller shall be as follows:

Multitask sequential scheduling, high reliability, particularly suitable for sequential control.

Support 5 programming languages of IEC61131-3 standard.

Abundant fieldbus support, good network openness.

Slave station mode, simple algorithm, difficult to undertake application of massive

coordination control occasions, suitable for device control application.

Features of DCS controller shall be as follows:

Multitasks scheduled as per priority occupation, with powerful processing capacity of

modulating. Suitable for implementation of complicated coordination control.

Support graphic control configuration mode, e.g. SAMA standard.

Strong network function, convenient to form massive control system.

Powerful control algorithm library.

The built-in PLC and DCS dual control engines of EDPF-CP system can run separately, parallelly,

and in coordination. It has greatly extended the capacity and application domain of control

system.

Single engine running mode: when only PLC or DCS control engine is running, the controller

becomes a programmable controller or DCS process control station. It can adapt to different

demands on application.

Twin engine parallel running mode: PLC function can complete sequence control more easily,

DCS function can complete complex control adjustment more smoothly, and both engines share

real-time data through internal mechanism.

EDPF-CP twin-engine controller running mode can still be distinguished into twin-engine


84

coordination mode dominated by PLC and twin-engine coordination mode dominated by DCS.

Twin-engine coordination mode dominated by PLC means that: to make use of the features of

PLC engine, e.g. powerful functions of sequence control and fast calculating speed to control the

controlled devices, and make use of the powerful network and algorithm library of DCS engine to

complete complex data analysis, statistics and calculation, and blend all information to DCS

system through network.

Twin-engine coordination mode dominated by DCS means that: a user can use PLC as private

process algorithm library to expand the control function of DCS further and realize the double

convenience of process logical security and debugging.

Fig. 14-1 EDPF-CP system diagram


85

Chapter XV Typical achievements of EDPF-NT

Up to December of 2016, EDPF-NT series of Dstributed Control System of Beijing

GuoDianZhishen Control Technology Co., Ltd. had outstanding achievements of 1950 sets,

including:

Applied to 1000 MW and ultra-super-critical thermal

power units 22 sets

Applied to 600 MW and super-critical thermal power

units 33sets

Applied to 300 MW thermal power units 202 sets

Applied to 300 MW or less thermal power units 250 sets

Applied to nuclear power concerned 7 sets

Applied to hydro power station control 19 sets

Applied to auxiliary shop control and municipal heating

system control 295 sets

Others 1122 sets

Massive application performance has indicated that EDPF-NT system of Beijing GuoDianZhishen

Control Technology Co., Ltd. has been capable to be applied to any heavy-duty generating unit.


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Among numerous achievements, EDPF-NT system has been applied to various large units and

the first unit and first set in China and the world for many times as follows:

15.1 2×1000MW ultra-super-critical units of Guodian Jianbi Power Station

This project was the domestic DCS system applied to 1000 MW ultra-super-critical unit for the

first time.

Primary functions realized by DCS in this project include: data acquisition system (DAS),

modulating control system (MCS), furnace security supervisory system (FSSS), sequence control

system (SCS) and electric control system (ECS). The scope of control and monitoring includes

the thermal production system of boiler, steam-turbine and auxiliaries, transform bank and station

supply system, circulating water system, by-path system, boiler soot blower system, denitration

system, firing system, cooling water circuit, boiler starting system, desulfurization system.

Host unit side is equipped with 44 pairs of DPUs, 6 pairs shared by host, 2 pairs for

desulfurization units, 3 pairs for desulphation utilities, thus two units plus the common and

desulphation have 101 pairs of DPUs.

Size of real I/O points: host unit 11231 points, host shared 1711 points, desulfurization unit 831

points, desulphation shared 1630 points, thus two units plus shared system have about 24000

points in total.In addition, unit side has 746 intelligent front end I/O points (communication points).

15.2 2×1000MW ultra-super-critical units of Guohua Xuzhou Power Station

Primary functions realized in this project include: data acquisition system (DAS), modulating

control system (MCS), furnace security supervisory system (FSSS), sequence control system

(SCS) and electric control system (ECS).The scope of control and monitoring includes the

thermal production system of boiler, steam-turbine and auxiliaries, transform bank and station



DPU allocation: 40 pairs of DPUs for host unit side, 4 pairs shared by host, 3 pairs for

desulfurization units, 7 pairs for desulfurization utilities, thus 2 units plus the common and



points, desulphation shared 2180 points, thus 2 units plus shared system have about 24000

points in total. In addition, unit side has 1090 intelligent front end I/O points (communication

points). Among others, unit side denitration system and water circulating pump system have

remote I/O cabinets, fuel pump house of utility system has remote I/O cabinet, and desulphation

utility system also has 6 remote I/O cabinets.

15.3 2×1000MW ultra-super-critical units of Guodian Hanchuan Power Station




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system (SCS) and electric control system (ECS).The scope of control and monitoring includes the




DPU allocation: 44 pairs of DPUs for host unit side, 4 pairs shared by host, 4 pairs for

desulfurization units, 3 pairs for desulphation utilities, thus 2 units plus the common and



points, desulfurization shared 1075 points, thus 2 units plus shared system have about 23000

points in total.

15.4 2×1000MW ultra-super-critical secondary reheat units of Guodian Taizhou

Power Station







DPU allocation: 54 pairs of DPUs for host unit side, 4 pairs shared by host, thus 2 units plus the

common and desulfurization have 123 pairs of DPUs.

Size of real I/O points: host unit 13168 points, host shared 631 points, thus two units plus shared

system have about 26967 points in total.

This project had technological break-through in aspects including coordination control, climatic

control, three-level by-pass overall control, water supply overall control, fuel auto overall control,

and unit auto start/stop control (APS).

15.5 600 MW super-critical cycle fluidized-bed generating units of Sichuan

Baima Power Station

---The only one 600 MW super-critical cycle fluidized-bed generating unit in the world



system (SCS) and electric control system (ECS).The scope of control and monitoring includes the


supply system, circulating water system, by-path system, denitration system, firing system,

cooling water circuit, boiler starting system, desulfurization system.

DPU allocation: 25 pairs of DPUs for host unit side, 5 pairs for remote system, thus 2 units plus

the common and desulphation have 30 pairs of DPUs.

Size of real I/O points: host unit 6816 points, host shared 1397 points, thus 2 units plus shared


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system have about 8213 points in total.

Because this project had higher difficulty, Beijing GuoDian Zhishen Control Technology Co., Ltd

developed a complete set of control policy optimistic algorithm applicable to super-critical cycle

fluidized-bed unit. Among others, boiler combustion heat calculation, SO2 prediction subtraction

control, self-balancing water supply command, sliding variable pure lag estimator used for

main-steam pressure-control, non-linearity double governor (PID + PD), and boiler heat retaining

compensated acceleration module are original technologies.

15.6 2×660MW ultra-super-critical units of Guodian Bulian Power Station

---Single row heavy-duty generating units as important auxiliaries of boiler





supply system, circulating water system, by-path system, denitration system, firing system,

cooling water circuit, boiler starting system, desulfurization system.

DPU allocation: 35 pairs of DPUs for DCS configurations of unit station, 6 pairs for utility system.

Including 85 pairs of DPUs for desulfurization and denitrification. 12 pairs of DPUs for auxiliary

water system, 3 pairs of DPUs for coal conveying system, 5 pairs of DPUs for ash removal

system, and 1 pair of DPU for boiler starting.

Size of real I/O points: host unit 10470 points, host shared 1453 points, thus two units plus shared

system have about 22393 points in total.Auxiliary water system 2490 points (including starting

boiler), coal conveying system 984 points, ash removal system 2656 points, and auxiliary network

6130 points in total.

This project adopts full ancillary single row arrangement, and DCS has ensured stable and safe

opration of units with optimized allocation of controllers and redundant cards.

Tel：+86-10-52615188 Hot line：+86-400 008 6060

Fax：+86-10-52615176 Web：www.gdzhishen.com

Mail: [email protected]

mailto:[email protected]

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