Scada components and functions pdf
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Monitoring. (viii) Report generation Components of SCADA The SCADA System essentially containscomponentsSensors Manual input HMI Panels or stations PLCs or RTUs SCADA Work Station The figure above displays ROC which is an example of R TU. The figure belows displays a PLC module MODULE DODDD. There are four components to a SCADA system Control. EEE SCADA Functions A SCADA system performs four functionsData acquisitionNetworked data communicationData presentationControl SCADA Subsystems A Human-Machine Interface or HMI is the apparatus which presents process data to a human operator, and through this, the human operator monitors and controls the process The term SCADA implies that there are two activities that are necessary: The acquisition of data and subsequent transfer to some central location (or group of central locations), and The control of some process or equipment from these central locations. Remember that PLCs can be used in place of RTUs. Field Instruments PLC/Remote Terminal Unit Communications Link – open standard (like MODBUS) and proprietary Central Computer Station including HMI Software – Proprietary for specific RTUs or open including interfacing many products supervisory control and data acquisition (SCADA) system performs the following major functions: Human-machine interface (HMI) Electrical communication. Non functional requirements Functional requirements specifies what is a system suppose to do and Non functional requirements specifies how a system should behave. Data collection, storage and retrieval (vii) Calculation. Components of SCADA The figure belows displays an HMI panel that is used for user interaction. Data acquisition (DAQ) and Transmission. MaintainabilityRepairing SCADA SYSTEM COMPONENTS These are the four basic parts of a SCADA system. Availabilitythe ratio of uptime to the sum of downtime and uptime. An HMI Panel provides various operator Display and Control Functions that are used toDisplay real-time status of system on maps Provide interface GUI pan, Zoom functions Display Dynamic coloring to represent various changes To learn more about SCADA Functions A SCADA system performs four functionsData acquisitionNetworked data communicationData presentationControl SCADA Subsystems A Human-Machine Interface or HMI is the apparatus which presents process data to a human operator, and through this, the human operator monitors and controls the process There are four components to a SCADA system: The central site which is the controlling station for the entire system, normally providing the operator interface for display of information and control of remote sites A SCADA system performs four functionsData acquisitionNetworked data communicationData presentationControl These functions are performed by four kinds of SCADA componentsSensors (either digital or analogue) and control relays that directly interface with the managed systemRemote telemetry units (RTUs) SCADA architecture & ComponentsSCADA system functionsNon functional aspects.