INDUSTRIAL AUTOMATION | Draw and explain block diagram of PID.

 Block diagram of PID Controller: 

OR

Explanation: 

PID is combination of three control actions: Proportional + Integral + Derivative. The proportional corrects instances of error, the integral corrects accumulation of error and the derivative takes the corrective action in anticipation. The effect of the derivative is to counteract the overshoot caused by P and I. When the error is large, the P and the I will push the controller output. This controller response

makes error change quickly, which in turn causes the derivative to more aggressively counteract the P and the I.