Supervisory control and data acquisition

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  • (page is self describing while it is updating) Special: Data server for fieldbus integration Several drivers for many fieldbuses available
  • Supervisory control and data acquisition

    1. 1. SCADA by Prasad Mane (05IT6012)School of Information Technology
    2. 2. Contents.. Introduction Hardware Architecture Software Architecture Functionality Conclusion ReferencesMar 17, 2012 SCADA 2
    3. 3. Introduction What is SCADA? What is data acquisition? Where and why, use of SCADA? Application area :  Industrial processes : chemical, power generation and distribution, metallurgy, …  Nuclear processes : reactors, nuclear waste, ...  Experimental physics : HEP laboratories  Application size:  20 k I/O to 450 K I/O,  1 M I/O under developmentMar 17, 2012 SCADA 3
    4. 4. ERP SystemsSCADA ? Expert Systems Supervisory Data And Acquisition Control Archiving, Logging, Graphics and Batch processing Access Control, Alarms Distributed database Data Server Data Server PLC’s Field Bus Control ProgramsMar 17, 2012 SCADA 4
    5. 5. Architecture Hardware SoftwareMar 17, 2012 SCADA 5
    6. 6. Hardware Typical Hardware ArchitectureMar 17, 2012 SCADA 6
    7. 7. Software ArchitectureMar 17, 2012 SCADA 7
    8. 8. Software Architecture Communication Internal Communication Access to Devices Interfacing H/W  Multiple communication protocols supported in a single system  Support for major PLCs/DCSs but not VME S/W  API  ODBC, DDE and OLE I/F to PC Products  OPC Client and OPC Server  ActiveX Containers Scalability Database Configuration DB, alarm DB, Archive DB, log DB and RTDB resides in the memory of the serversMar 17, 2012 SCADA 8
    9. 9. Functionality  Generic SCADA functionality  Access Control,  MMI,  Trending,  Alarm Handling,  Logging, Archiving,  Report Generation,  Automation. Mar 17, 2012 SCADA 9
    10. 10. Functionality Contd.. Access Control Users - allocated to groups group - defined read/write access MMI multiple screens library of standard graphical symbols dragged and dropped zooming, re-sizing, scrolling... Links - pages to navigateMar 17, 2012 SCADA 10
    11. 11. Functionality Contd.. Trending based on parameters on specific chart can be predefined or defined on-line more than 8 trended parameters per chart both real-time and historical trending zooming and scrolling Alarm Handling based on limit and status checking handled centrally E-mails can be generatedMar 17, 2012 SCADA 11
    12. 12. Functionality Contd.. Logging, Archiving  Data stored in compressed and proprietary format  Logging / Archiving either for a set number of parameters or for a set period of time  Logging / Archiving can be frequency or event driven *  Logging of user actions together with a user ID  VCR facility for playback of stored data  Writing logs into RTDB Report Generation  Reports created using SQL type queries to the RTDB or logs  Automatic generation, printing and archiving of reports  Use of ‘components’ for report generationMar 17, 2012 SCADA 12
    13. 13. Functionality Contd.. Automation triggered by events defined in scripting languages send e-mail ,write into RTDB recipes SequencingMar 17, 2012 SCADA 13
    14. 14. Development Tools Project editor Graphics editor Configuration through parameter templates Scripting language Driver Development Tool Kit And more…Mar 17, 2012 SCADA 14
    15. 15. Data Access Mechanisms Alarm Server Alarm Server typically poll data from the data server ( -> impact on network Data Server bandwidth) Polling More advanced techniques like publish / subscribe are available in some cases Po l l in g Data from field buses are mainly polled Field BusMar 17, 2012 SCADA 15
    16. 16. Conclusion SCADA is a control system with •More frond end functionality •More interfaces and efficient storage •More record or device oriented configuration •but System wide configuration tools are needed •are less expensive than DCS, but offer different functionality than DCS •And finally various applicationsMar 17, 2012 SCADA 16
    17. 17. References www.scadanews.com www.princeton-indiana.com/wastewater/pages/scada/scada-overview.h www.ref.web.cern.ch/ref/CERN/CNL/2002/003/scada/ www.sss-mag.com/scada.html www.scada.comMar 17, 2012 SCADA 17

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