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PID constants

Question asked by Binu K on May 29, 2015
Latest reply on Jun 2, 2015 by Edward Karpicz


  Iam using HCS08 and codewarrior studio.    I implemented a PID algorithm for a generator speed control by  valve control  using stepper motor. Here Iam measuring rpm of generator with hall effect  sensor as  a feedback.

It works fine, but in this algorithm I changed my Kp,Ki,Kd constants in different conditions. ie nearest of setpoint I changed these constants to get fine values and if there is a big difference changed to get large error value.


My question is , can i change PID constants in running condition? Is it favourable ?