Automation Direct DL05 User Manual page 106

The derivative gain can be helpful for those control loops which are not controlling
temperature. For these loops, try adding a value of 0.5 for the derivative gain and see if this
improves the control output. If there is little or no response, increase the derivative by
increments of 0.5 until there is an improvement to the output trend. Recall that the derivative
gain reacts with a rate of change of the error.
DL05 Micro PLC User Manual, 6th Edition, Rev. A
Chapter 8: PID Loop Operation
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