supervisory control and data acquisition system
- 1. SCADA ( supervisory control and data acquisition ) -submitted by R.selvakumar dept of electrical engg TKSCT,Theni.
- 5. What is SCADA? SCADA (supervisory control and data acquisition) is a category of software application program for process control, the gathering of data in real time from remote locations in order to control equipment and conditions.
- 7. History of SCADA : >SCADA systems became popular in the 1960's as the need to monitor and control remote gear grew. >Early systems were built from main frame computers and required human oversight to operate. This made early system expensive to use and maintain. > Today, with new technology, SCADA systems are much more automated. They can serve efficiently. This reduces cost and overhead to companies with network alarming needs.
- 8. 1. Data acquisition 2.Data presentation 3.Network & communication 4.Control
- 9. Common system components SCADA : >Remote terminal unit (RTU) >programmable logic controller (PLC) >Telemetry system >Human machine interface >Data acquisition system
- 10. Remote Terminal Unit(RTU) : A remote terminal unit (RTU) is a microprocessor controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA system by transmitting telemetry data to a master system by using messages from the master supervisory system to control connected objects. Other terms that may be used for RTU is remote telemetry unit or remote tele control unit.
- 11. Block diagram :
- 12. Two basic Modular RTU : 1.single board RTU 2.modular RTU
- 13. Single board RTU : Which is compact , and contains All I/O on a single board . the single board normally has fixed. Eg: (16 digital inputs,8 digital outputs, 8 analog inputs, and say 4 analog outputs ).
- 14. Modular RTU : which has a separate CPU module and can have other modules added normally by plugging in into a common ‘Black plane’ ( a bit like a pc motherboard and plug in peripheral cards)is designed to be explained by adding additional modules.
- 16. Programmable logic controller : The basic of SCADA lies in automation majorly done by PLCs (programmable logic controller). Using this, a project can be done with effective increase of speed, and meaningful processing.
- 17. Data acquisition system : Data acquisition is the process of sampling signals that measure real world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer.
- 18. Future trends of SCADA : High-speed communication hubs are being developed to empower organisations with greater asset control. The combination of design know-how and communications networks is the key to real-time monitoring and asset management.