PLC, DCS, RTU, SCADA and PAC Systems

PLC – Programmable Logic Controller

PLCProgrammable logic controllers are electronic devices used to control a process. It consists of CPU; Input and output devices, power supply, communication and redundancy units. PLCs are preprogrammed based on their application and put into operation. A PLC accepts inputs from the field, process the input based on the programming done and outputs the commands to the field equipment. It can also accept commands from the plant operators through SCADA and give commands to the field equipment. The features of PLCs vary from one manufacturer to the other but the basic architecture remains the same. (more…)

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Difference between Soft Starters and VFDs | Selection: Soft Starters v/s VFDs

Variable frequency driveVariable frequency drives and Soft starters are widely used in industrial motor control and pump control. Both of them are semi-conductor devices. VFD and soft starters although working on similar principle are different from each other.


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