Development of supervisory control for distributed drives system

Continuous monitoring and control of motors and drives have become a need of process industries, which require operation of various drives in a pre-designated sequence. The programmable logic controllers (PLCs), an intelligent device, can realise automated operation. Distributed control system has partially autonomous local computational capability, interconnected through a digital communication link and coordinated by a supervisory control and data acquisition (SCADA) system. The resulting system has the advantages of local as well as centralized control. This paper describes the methodology, implementation, operation, monitoring and control of distributed drives with PLC and SCADA system. The performance of the drives are studied and analyzed for starting and load perturbation.