Post on 21-Jan-2015
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SCADA
WHAT IS SCADA?• SCADA stands for Supervisory Control AndData Acquisition.
• SCADA refers to a system that collects datafrom various IO signals at a factory, plant or inother remote locations and then sends this data to a central computer which then manages and controls the data.
WHAT IS DATA ACQUISITION?
• Process of retrieving control information from the equipment which is out of order or may lead to some problem.
• Continuous monitoring of the equipment to which it is employed.
• Data accessed forwarded onto a telemetry system ready for transfer to the different sites.
TYPES OF PROCESSES
INFRASTRUCUTRE PROCESSES
• Telecommunications
• Transportation
• Water and Waste Control
INDUSTRIAL PROCESSES
• Manufacturing/Production
• Quality Control
• Maintenance
FACILITY PROCESSES
• Oil and Gas
• Electricity/Power
SCADA HIERARCHIAL LAYERS
RTU
• Short for remote terminal unit • Installed at remote location• Collects data, codes the data into a format that is transmittable
• Transmits the data back to a master • Collects information from the master device and implements processes that are directed by the master.
• Input channels for sensing or metering• Output channels for control, indication or alarms • Communications port.
PLCs vs RTUs
PLCs used as field devices because:
• more economical• versatile• flexible• configurable
HMI
• Presents process data to a humanoperator
• operator monitors and controls the process from here
• Master device
SCADA TWO BASIC LAYERS
SCADA SOFTWARE ARCHITECTURE
SCADA LAYERS
Scada Video Clip