Answer / symon lourdes

In other way...

Open Loop means ,only we use for the monitoring and
recording purposes

The closed loop will be for the controlling the final
control element in order to match with the desired set
point.

Answer / debasish sarkar

Open Loop: If we don't have any control in O/P of a loop
that is called open loop.

Close Loop: If we have any control in O/P of a loop that is
called closed loop.

Answer / naveen pandey

LET's elaborate in right way !

IN closed loop system, a feedback is provided so that output can be compared with the reference value to give an error signal. by this one can control the parameters of a system and output value can be optimized.

Whereas in OPEN LOOP, no feedback is provided. optimization is not possible.

Answer / raj mon

open loop which having only indication process variables is open loop
close loop both indication and controlling process variables is close loop

Answer / guest

There are seprete controller for all system in open loop
i.e gas flow, compressed air ect.and in close loop
controlled by one computer.

WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem."

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