Toshiba TOSVERT VF-AS3 Instruction Manual page 222

Memo
3) Adjusting PID control gain level
Adjust the PID control gain level according to the set values, the feedback signals, and the
object to be controlled.
Title
4
F362
F363
5
F366
<F362: PID1 proportional gain>
This parameter adjusts the proportional gain level of PID control. A correction value proportional
to the particular deviation (the difference between the set value and the feedback value) is
obtained by multiplying this deviation by the parameter setting.
A larger P-gain adjustment value gives faster response. Too large an adjustment value,
however, results in an unstable event such as hunting.
9
<F363: PID1 integral gain>
This parameter adjusts the integral gain level of PID control. Any remaining deviations (residual
deviation offset) during proportional action are cleared to zero.
A larger I-gain adjustment value reduces residual deviations. Too large an adjustment value,
however, results in an unstable event such as hunting.
5. [Fundamental operation] How to use parameters
• PID control can be temporarily turned off with an external signal. Assign "36: PID control OFF"
to an input terminal.
• PID control should be OFF when very low speed drive is needed.
• If speed PID is selected, motor is possibly rotating forward and reverse. If you don't want to
rotate reverse, set <F311: Reverse inhibited> or select process PID (<F359>=1, or 11).
Parameter name
PID1 proportional gain
PID1 integral gain
PID1 differential gain
Output frequency
<F362> Large
Fast response
Adjustment range
0.01 - 100.0
0.01 - 100.0
0.00 - 2.55
<F362>
Small
Slow response
5-56
E6582062
Default
Unit
setting
- 0.30
0.20
-1
s
s 0.00
PID set value
Time