Page 17 of 18
2.9
Manual Tuning
In certain applications, using Auto-Tuning may be inadequate for the control requirement, or, the process
moves too slowly to Auto-tune accurately.
If this is the case, the user can try manual tuning.
If the control performance by using Auto-Tuning is still unsatisfactory, the following guidelines can be applied
for further adjustment of PID values.
ADJUSTMENT SEQUENCE
SYMPTOM
SOLUTION
Proportional Band ( PB )
Slow Response
Decrease PB
High overshoot or Oscillations
Increase PB
Integral Time ( TI )
Slow Response
Decrease TI
Instability or Oscillations
Increase TI
Derivative Time ( TD )
Slow Response or Oscillations
Decrease TD
High Overshoot
Increase TD
2-2.PID Parameter Adjustment Guide
2-5. Effects of PID Adjustment
