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).

Is This Answer Correct ?    21 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Explain PID controller tuning & any one method used for it.

7142


what is cems analyzer explain with principle and drawing ?

1953


Capacitance, resistance ( colour coding ), parallel & series circuits.

1849


I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1554


types of cable..? Use of every types of cable..?

1732






why using negative supply for bentley nevada vibration system ?

1795


how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw

2238


What are different types of orifice plates? State their uses.

724


key exchanges in wpa,wpa2,tls

1600


 why Fahrenheit unit of moistur analyzer transmitter

1876


What is the calibration procedure of Drum level transmitter if range is 0 to -400 mmh2o in lab?

1775


how 3 out of 2 Logic/interlocks works? give brief explanation with help of diagram.

1959


Name different types of bourdon tubes.

756


how to calibrate Necleuonic level transmitter.?

1747


I want to apply for the universities in US,but i got the GRE score of (650+300=950)TOEFL 69/120.Is this score sufficient for applying universities please i am married i need to go to US because my husband didn't get H1 yet.please send me suggestion

1552