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Follow the procedure below to set data to PID control function codes.
It is highly recommended that you adjust the PID control value while monitoring the system
response waveform with an oscilloscope or equivalent. Repeat the following procedure to
determine the optimal solution for each system.
- Increase the data of J03 (PID control P (Gain)) within the range where the feedback signal
does not oscillate.
- Decrease the data of J04 (PID control I (Integral time)) within the range where the feedback
signal does not oscillate.
- Increase the data of J05 (PID control D (Differential time)) within the range where the
feedback signal does not oscillate.
Refining the system response waveforms is shown below.
1) Suppressing overshoot
Increase the data of J04 (Integral time) and decrease that of J05 (Differential time.)
2) Quick stabilizing (moderate overshoot allowable)
Decrease the data of J03 (Gain) and increase that of J05 (Differential time).
3) Suppressing oscillation whose period is longer than the integral time specified by J04
Increase the data of J04 (Integral time).
4) Suppressing oscillation whose period is approximately the same as the time specified by
J05 (Differential time)
Decrease the data of J05 (Differential time).
Decrease the data of J03 (Gain), if the oscillation cannot be suppressed even if the
differential time is set at 0 sec.
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