ECL MODBUS OPC Instructions - Danfoss...

ECL MODBUS OPC

Instructions

DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008

VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK

Instructions ECL MODBUS OPC

Table of Contents

1. Introduction 31.1 Prior to installation ......................................................................................................................................................................................................................4

2. How to install the program 4

3. Navigation in the Configurator 5

4. How to get started 54.1 Network scan .................................................................................................................................................................................................................................64.2 Device scan ....................................................................................................................................................................................................................................74.3 Device and tag names................................................................................................................................................................................................................84.4 Conversions ...................................................................................................................................................................................................................................84.5 Third party products ..................................................................................................................................................................................................................9

5. Installation and technical information 9

6. Troubleshooting 10

DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008 3


1. IntroductionThis instruction covers the ECL MODBUS OPC, i.e. the ECL MODBUS Configurator and the ECL MODBUS OPC Server.

The ECL MODBUS OPC Server uses the OPC Data Access Specification version 2.0.

The ECL MODBUS OPC Configurator and Server can communicate with ECL Comfort controllers with ECA 71 module. The communication takes place by means of Windows COM ports, e.g. COM1. The Server can use multiple COM ports to support multiple networks.

The ECL MODBUS OPC Configurator and Server are in the following referred to as Configurator and Server. The Configurator is used for the setup of the Server. Setup changes will not take effect until the Server has been restarted.

The Configurator is an online tool that can scan a network for ECL Comfort devices and their parameters. Devices, groups and parameters can also be added manually.The network scan searches a network for installed ECL Comfort devices. The search is done from address 1 to address 247. The network scan can only add new devices – existing devices will NOT be deleted.

The device scan retrieves the parameter list from the selected ECL Comfort controller. The parameters are placed in a hierarchical structure depending on the ECL Comfort application. The device scan can only add new folders and parameters – existing folders and parameters will NOT be deleted.

This help file is written for ECL MODBUS OPC version 1.1

It is recommended to make a backup of the OPC database before modifications are carried out.

TCP/IP, USB or RS-232 to RS-485 (MODBUS)

SCADA system: Connected via Danfoss MODBUS OPC server

ECL Comfort

Heat meter

M-Bus connection

Third party OPC Client

4 VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK


1.1 Prior to installation

Min. PC requirements• Intel Pentium or equivalent processor• Windows 2000®, Windows NT or Windows XP• 128 MB RAM• 500 MB free hard disk space

References

Type Description Code No. (Parts list No.)

ECA 71 MODBUS communication module 087B1126

Documentation available on http://heating.danfoss.com:Instructions, ECA 71 protocolInstructions, ECA 71 / 72 installation and user guide

(087R9775, English)(087R9769, English)

CablesThe required cables will depend on the used equipment. Consult the MODBUS RS-485 converter documentation for further details.

Please do also consult the ECA 71 instructions for details about the network layout and connection.

MODBUS RS-485 ConvertersThe MODBUS network uses a 2-wire RS-485 interface. This interface is typically not part of a standard PC, and it is therefore necessary to connect a MODBUS RS-485 converter.

Basically there are 4 groups of converters:• RS-232 ↔ RS-485• USB ↔ RS-485• TCP/IP ↔ RS-485• Expansion module, e.g. PCI ↔ RS-485

Common requirements for all converters are that they have to be capable of running MODBUS RS-485, the desired communication setting (baud rate, parity etc.) and must offer a Windows COM (Virtual COM) port interface to the Configurator and Server.

The MODBUS standardspecifies line termination and polarization. It is an advantage if this is built into the converter. It is recommended to use isolated converters (and repeaters) to increase robustness.

For specific details, please consult the specifications• Modbus Application Protocol V1.1a.• MODBUS over Serial Line, Specification & Implementation guide V1.0both of which can be found on http://www.modbus.org/

Achievable performance will depend on the chosen converter.

2. How to install the programRun the Setup.exe file on the PC onto which the OPC Server and Configurator must be installed. Follow the installation wizard. The next step is to read the section on “How to get started”.



3. Navigation in the ConfiguratorThe Configurator resembles the Windows Explorer, with a left-hand side for level/item navigation and a right-hand side with details for the selected level/item.

In the Configurator new ports, devices, groups and parameters can be added with a right-click of the mouse or by means of the menu item ‘Edit’ ↔ ‘New’.

The illustration shows the hierarchical structure (as known from the Windows Explorer) with the newly created folders ‘NewPort’, ‘NewDevice’, ‘NewFolder’ and ‘NewDataItem’.

4. How to get startedAfter installation it is necessary to configure the database or select an already existing (valid) database. The database configuration must be carried out with the Configurator.

An existing database can be selected by opening the database and closing the Configurator. When this is carried out, the Configurator will ask whether the new database should be used for the Server.

For the configuration of a new database, the following steps must must be carried out for each network:

1. Run the Configurator (located in the start menu, ‘Programs’ ↔ ‘District Heating’ ↔ ‘ECL MODBUS OPC Server’ ↔ ’Configurator’)

2. Add/select a port by specifying the COM port and the serial settings3. Scan the network or add devices manually4. Scan each device or add groups and parameters/tags manually5. Close the Configurator



The database is configured and the Server has the parameters/tags which an OPC client can use.

If the network is updated or expanded, e.g. new controllers are added or application cards changed, it is recommended to follow the steps above for an update of the database configuration.

4.1 Network scan

The network scan is used to search the network for new devices. Third party products are not supported by this function, and must be added manually.

The network scan can be activated in the port window. Before the scan, the correct communication parameters must be set.The network scan takes approximately 1 – 5 minute to complete.

DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008 �


4.2 Device scan

Device scan is used for finding the groups and parameters of a device. Whenever a device has been replaced, the application changed etc., this function should be used. Third party products are not supported by this function, and must be added manually.

The device scan can be activated in the device window – after the network scan. Before a scan, a device must be selected. The device scan takes approximately 1 – 5 minute to complete.

The device scan can only be used for ECL type devices.

If a device is re-scanned, the old folders should be deleted.

The button ‘Fill Conversions’ must be used before a scan if the database does not contain the necessary scales. It adds/repairs the necessary default conversions items.



4.3 Device and tag names

Device and tag names are generated automatically. The names will therefore be the same from scan to scan if nothing is changed (version of Configurator, ECA 71, ECL Comfort, or Application).

Whenever possible, the automatically generated names should be used, as this will reduce overall system setup modifications.Description field can be changed if desired.

4.4 Conversions

All values can be converted (scaled) by the OPC Server.

To add/modify a conversion:1. ‘Add/Modify’ a conversion in the Conversions folder.2. For the parameters that require conversion, select ‘Use conversion’ in the parameter dialog and then select the appropriate

conversion

Default conversions ‘ECL Scale x’ is a conversion which is equal to 10x, e.g. ‘ECL Scale -1’ is equal to 10-1 (division by 10).‘ECL Scale Schedule’ is used for all schedule values. As default the conversion will divide the values by 100, i.e. 8:00 is 8 and 8:30 is 8,3 (not 800 and 830). The conversion can be changed if this representation is not desired.



4.5 Third party products

Third party products, such as general inputs/outputs, which support the standard MODBUS RTU interface can manually be added with the Configurator.

New devices, groups and parameters can be added by a right-click of the mouse or the menu item ‘Edit’ → ‘New’.

Note that any third party products must use the same communication settings as the rest of the network (baud rate, parity etc.).

5. Installation and technical informationThe installation includes the files ‘PNU & GROUP numbers parameter list.txt’ and ‘search list.txt’. These files are used during a device scan and are not to be modified.

Cache functionThe ‘Cache’ folder contains cached device scan results. When a new application type is scanned, a cache file is generated. If an application type is known, the cached file will be used, thus eliminating a complete device scan. This will speed up the process.

The cache function can be enabled/disabled by creating/deleting the ‘Cache’ folder.

Scan timeoutThe network scan timeout parameter can, if necessary, be changed by adding a DWORD value with the name ScanTimeout to the registration database key.

HKEY_CURRENT_USER\Software\Danfoss A/S\ECL Modbus OPC Configurator\Options

The default value is 250 ms.(The device scan uses the device read timeout).

Default databaseThe installation includes a default database named ECL_ModbusOPCConfigurator.mdb.

Database compatibilityDatabases from ECL MODBUS OPC version 1.0 are usable after the ‘Fill Conversions’ function has run.Databases from Demo Iconics MODBUS OPC are not compatible.



6. Troubleshooting

Fault Cause SolutionNo database Installation not complete • Uninstall and reinstall the program

Alternative

• Create a new database with ‘File’ → ’New’

• Or open an existing database with ‘File’ → ‘Open’

When the program is closed, choose ‘Yes’ to set the new database as the current one.

Network scan does not find any devices

False communication port and/or settings

• Check that the COM port setting is correct.

• Check that the cable/network is connected correctly

• Check that cable termination and polarization is correct

Device scan does not find all parameters

Not fully supported module • Manually insert the missing parameters

• Update the Configurator if possible

Low server performance Invalid devices and/or parameters.To high update rate requested.Low performing converters/repeaters

• Remove invalid devices (that do not exist in the network)

• Remove invalid parameters (that do not exist in the device)

• Change the requested update rate to a more reasonable value

• Check that converters and repeaters are correctly installed and have the needed performance

• Converters that run over other media (e.g. the internet) can introduce delays

OPC server doesn’t work or client can’t connect to it

The OPC Core Components are not fully installed(this problem normally only occurs on a PC with no prior installation of an OPC system)

• Install the OPC Core file from the folder “{installpath}\OPC Core Components Redistributable x.xx.xxx\Release”

VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK


Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in speci�cations already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Disposal InstructionEquipment containing electrical components shall not be disposed together with domestic waste.It must be collected separately with other electrical and electronic waste according to local legislation.

ECL MODBUS OPC Instructions - Danfoss...

Documents

Transcript of ECL MODBUS OPC Instructions - Danfoss...