WHAT IS THE DIFFERENCE B/W PLC and DCS

Answer Posted / vaibhava satsangi

PLC - PROGRAMABLE LOGIC CONTROLLER
DCS - DISTRIBUTED CONTROL SYSTEM

PLC - PREFERED FOR SMALLER APPLICATIONS, DIGITAL I/OS,
DIGITAL INTERLOCKS, CAN BE USED IN REDUNDENT APPLICATIONS
IF USED FOR PROCESS CONTROL I/O ADDRESSES AND TABLES LOADED
ON A SEPRATE PC's.

DCS - PREFFERED FOR BIGGER APPLICATIONS, TO CONTROL
DIFFERENT PLANTS LOCATED AT DIFFERENT LOCATION FROM THE
CENTRLISED/LOCAL LOCATION, MAY BE CONTROLLING VARIOUS PLC's
ALSO, PREFFERD FOR PID's GROUPS, THIS A EXPENSIVE &
CRITICAL CONFIGURATION, PREFFERD TO CONTROL CRITICAL
PROCESS. I/O ADDRESSES AND TABLES LOADED WITHIN SYSTEM CAN
BE ASSESSED FROM ANY HMI(HUMAN MACHINE INTERFACE).

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