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What is a PID?
A Process to work in Automatic mode must be properly tuned for optimum performance.If the parameters tuned are incorrect ,then there would be wastage of resources.The Process we dealt with in the previous page (i.e heat exchanger) forms the base of process control.More complex loops are present in addition to feedback control..It is called feedback control because the feedback control is fedback & an error is calculated as SP-PV and fed to the controller before being fedback to the final control element(FCE).
The feedback control suffers from a disadvantage,its DISTURBANCE affects the process. To shield the effects of disturbances as in feedback control we have CASCADE control loop.
A Process to work in Automatic mode must be properly tuned for optimum performance.If the parameters tuned are incorrect ,then there would be wastage of resources.The Process we dealt with in the previous page (i.e heat exchanger) forms the base of process control.More complex loops are present in addition to feedback control..It is called feedback control because the feedback control is fedback & an error is calculated as SP-PV and fed to the controller before being fedback to the final control element(FCE).
The feedback control suffers from a disadvantage,its DISTURBANCE affects the process. To shield the effects of disturbances as in feedback control we have CASCADE control loop.
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