Question

What is PID controller in PLC?

Answer 1

PID controller Derivative response. Proportional and Integral controller: This is a combination of P and I controller. Output of the controller is summation of both (proportional and integral) responses. Mathematical equation is as shown in below; y(t) \u221d (e(t) + \u222b e(t) dt) y(t) = k_p *e(t) + k_i \u222b e(t) dt.Jan 7, 2018

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PID control is used where greater levels of precision in control are required. It combines three control terms to give a single output to drive the setpoint. The Proportional band gives an output that is proportional to the error (the difference between the setpoint and the actual process value).