Basic SCADA for Operators - bcwwa.org Traditional vs. High Performance HMI 2019 BCWWA SCADA & IT...
Transcript of Basic SCADA for Operators - bcwwa.org Traditional vs. High Performance HMI 2019 BCWWA SCADA & IT...
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William Wong, Electronics Engineering TechnologistCity of Richmond
Basic SCADA for Operators
BCWWA SCADA & IT ConferenceNovember 20-21, 2019
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2019 BCWWA SCADA & IT WORKSHOP
Richmond
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2019 BCWWA SCADA & IT WORKSHOP
Geographical and Infrastructural• Average elevation 1 meter above
sea level• Waste water, drainage water and
fresh water infrastructure below sea level
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Presentation Outline
4
1. What is SCADA?
2. Benefits of SCADA
3. Core Components of a SCADA System
4. Communications and Networks
5. Security
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2019 BCWWA SCADA & IT WORKSHOP
What is SCADA?
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SCADA• Supervisory Control And Data Acquisition
• This is a scalable, distributed measurement and control system• In our case, to monitor all City utility infrastructure which includes
Sanitary, Drainage, and Water Pressure Reducing Valve (PRV) stations
• IT or OT – “Operational Technology”• Industrial Process Control and Monitoring
• Oil and Gas• Manufacturing• Food and Beverage• Energy• Transportation• Water and Wastewater
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Pump Station Monitoring
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Benefits of SCADA
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Benefits of SCADA
• System monitoring and remote control of infrastructure• Alarms/Events Processing and Management
• The ability to collect quality information anywhere in your system infrastructure no matter how far it is!• Status and Sensor information from pumps, levels, power, water
quality, and faults
• Historical data collection• Data Analytics
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(cont.) Benefits of SCADA
• Increased efficiency and productivity• Reduced operating cost• Reduced overtime and callouts• Process forecasting• Troubleshooting and preventative maintenance
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Historical Processing – I&I
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Historical Processing – Weather Events
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King Tides and Storm Surge
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Analytics – Predictive / Forcasting
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Video
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2019 BCWWA SCADA & IT WORKSHOP
Core Components of a SCADA System
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Core Components of a SCADA System
• Field Instrumentation or Devices• Controllers• Communications• SCADA Host
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SUPERV
ISORY
COMMS
CONTR
OLLER
FIELD
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Field Instrumentation or Devices
• Digital or Analog• Input or Output
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Controllers
• PLC vs. RTU
• Control or Communication?
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Programming
IEC-61131• Ladder Diagram• Instruction List• Function Block Diagram• Structured Text• Sequential Function Chart
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Communications
Wired Communications:• Ethernet• Serial• PSTN• Fibre-opticWireless Communications:• Radio• Cellular• Satellite• WiFi
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Communications Comparison
Initial Investment
Monthly Cost to Operate
BandwidthResiliency / Reliability
Coverage
Radio High Very Low Low ‐ High Very HighLimited (by line of sight or transmit power) to Good
Cellular Medium Low‐Medium High Low*Dependent on service provider coverage
Satellite Medium Very High Low ‐Medium Medium Good with sky view
Fibre Optic Very High Very Low Very High High Good for backhaul and hubs
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*wait until 5G!
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SCADA Host, HMI, Historian
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Traditional vs. High Performance HMI
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Traditional vs. High Performance HMI
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Traditional vs. High Performance HMI
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Dashboards
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Dashboards on Mobile Device
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Dashboards on Mobile Device
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Alarm Notification and Management
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• Too much, Stale, Chattering and Nuisance Alarms• Keys to an effective Alarm Management:
• Alarm Definition• Alarm Priority• Alarm Tracking• Accountability
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Historian
• Minimal disk space• Quick data retrieval• “Big Data” Analytics
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Data Logging
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Communications and Networks
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Network Architecture
• Monolithic
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SCADA Host
PLC/RTU
PLC/RTU
PLC/RTU
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Network Architecture
• Distributed
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PLC/RTU
Local Area Network
PLC/RTU
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Network Architecture
• Networked
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PLC/RTU PLC/RTU PLC/RTU
PLC/RTU PLC/RTU
PLC/RTU PLC/RTU
WAN
WAN
WAN
PLANT 1 PLANT 2
REMOTESTATIONS
CORPORATENETWORK
CENTRAL SCADA NETWORK
LAN LAN
LAN
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Wireless Radio Network
• De-centralization of radio network• Not to have “all your eggs in one basket”• Creating “cells” or segments• Robustness and Resiliency• Utilizing Backhaul Radios• Radio Management Software
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Security
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Modern SCADA System Features
• Remote Access• Web-based Clients• Mobility• Inter-organization demand for SCADA Data (MMS, GIS,
etc.)• Cloud Computing
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SCADA Site
• Signage• BFL - Big Front Locks• Alarm and Access Control• Video Surveillance
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Risks and Considerations
• Physical security• Legacy components• SCADA network <> corporate network• Default out-of-the-box user credentials• SCADA Host access to the internet• Employee transition protocol
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Thank You!Questions?
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