Supervisory Control

Supervisory control

SCADA stands for Supervision and Control Data Acquisition. It is not a full control system, but more focusing on a supervisory stages. Therefore, it is a software package that is has link with RTU ( Remote Terminal Unit )

Advantage of Supervisory Control:

•With supervisory control architecture, primary loop control is returned to analog controller, while the supervisory control computer monitors the process and adjust the set points.

•Analog controllers added to DDC computer system enchance the overall reliability

Disadvantage of Supervisory Control :

•Extensive wiring is required between the analog controllers and the supervisory computer and also between other instruments and the computer system

•Supervisory control is costlier than DDC

•Interfacing equipment from multiple vendors (interfacing one vendor’s computer analog instrumentation ) is difficult