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Understanding SCADA Systems: Evolution, Features, Evaluation & Future Trends

Explore SCADA systems - history, structure, features, and evaluation. Learn about their openness, evolution, and applications in industries like CERN. See a sample system and future possibilities.

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Understanding SCADA Systems: Evolution, Features, Evaluation & Future Trends

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  1. SCADA Systems - What is the scope of this talk? • What are SCADA systems? • What are their structure and main features? • How open are they? • How are they evolving? • How are they being evaluated? • Example System • Conclusions

  2. What is a SCADA System? • Supervisory Control And Data Acquisition • Sits on top of process controllers (front-ends) • User tools to supervise and control the process • Used extensively in industry and also increasingly at CERN • Current application sizes from a few hundred I/Os to n*100000 I/Os • PC/NT-based

  3. SCADA Structure • Tag-based (Tag=basic data item) • Distributed Systems • Server/Client over Ethernet (TCP/IP) • Polling of Front-End (Mostly)/Event Driven Internally • Often Proprietary Configuration, RT and Archive DBs

  4. Basic Features (Development) • Integrated Development Environment • Graphics Editor • Database Editor • Report, Recipe and Script Editors • Toolkits • API • Driver Development

  5. Basic Features (Run Time) • SC Data Acquisition Including Standard Drivers • Alarm Handling • Data Logging • Data Presentation (Synoptic/Trending) • Access Control • Redundancy • Network Connectivity • Report & Recipe Handling

  6. API OPC Client & Server ODBC (OLEDB) COM/DCOM ActiveX Web ASCII/CSV (Configuration) DDE Openness

  7. Evolution • Very fast evolution • Towards OO • Internal communication based on DCOM • MMI based on ActiveX • Web-based MMI • OPC for connection to H/W as well as OPC Server for connection to external systems • Increasing Application Size

  8. Evaluation • Extensive Market Survey • 5 products being evaluated in a hands-on fashion • 2/3 more potentially interesting products • Test-bench • Evaluation findings to be presented at JCOP II Workshop in September http://itcowww.cern.ch/jcop/subprojects/TSurvey/ Shared disk on PCITCO04 (Scada Documents)

  9. Provide Suitable Connectivity Configure Tags Commands (Enable/Disable, On/Off) Values (Status bits, Currents, Voltages) Model Device Behaviour Derived Parameters Scripts (Internal Program) API PLC/VME Configure Alarms and Logging Configure MMI Configure Automatic Generation of Report Standard Access from Control Room via MMI Remotely Web Dial-Up Remote console software Power Supply Control System (Example)

  10. Features Generally Not Provided (Currently) • FSM (Batch Management?) • Array Handling • Device Handling • Front-End S/W

  11. Conclusions • SCADA systems provide many features required by LHC experiments • Are generally open • Are evolving very rapidly • Some features missing • Evaluation goals: • What is covered by SCADA? • Can missing features be easily added? • Results will be presented in JCOP II

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