Toshiba ASD 9 Series Manual page 22

F360 — PID Feedback Signal disables/enables PID feedback control. Set this parameter to enable PID
and select the feedback source.
0: PID Control Disabled
1: V/I
2: RR
3: RX
4: RX2 (AII)
5: Option V/I
6: PG Feedback Option
F361 — PID Feedback Delay Filter sets the delay in the ASD output response to the motor-control
feedback signal source selected at F360. The delay filter in the feedback signal reduces process-induced
high frequency changes in the feedback speed.
F362 — PID Feedback Proportional (P) Gain sets the degree that the Proportional (P) feedback
affects the output signal. The larger the value, the quicker the ASD responds to changes in feedback.
Setting the proportional gain excessively high may result in output over-correction and oscillation.
Change in ASD Response with Change in Proportional Gain. (I and D settings held constant)
Output Frequency
F363 — PID Feedback Integral (I) Gain sets the degree that the Integral (I) feedback affects the
output signal. The smaller the value, the more pronounced the effect of the Integral feedback on the
output signal. Integral gain determines how much the cumulative deviation (difference between the
process value and the feedback value) affects the output signal. Although a larger gain setting is
effective in reducing the residual deviation, setting the gain excessively high may result in output over-
correction and oscillation.
Change in ASD Response with Changes in Integral Gain. (P and D settings held constant)
Output Frequency
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F362 = 1
F362 = 0.01
F363 = 1.0
0.5
0.3
0.01
Reference Process Value
Time
Reference Process Value
Time
PID Control Manual