Delta VFD-V Series, User Manual, Page: 90 / 185

5
VFD-V Series
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5-59
5.9 Group 8: High-Performance Parameter
08-00 PID Feedback Terminal Selection a Factory setting 0
Settings 0 Disable
1 AVI (0~10V)
2 ACI (4~20mA)
3 AUI (+/-10V)
4 Clock (F/R--master speed)
5 Clock (F/R--A/B direction)
Select an input terminal to serve as the PID feedback position. Please verify the
feedback position is different from the Frequency Set Point position.
08-01 Proportional Gain (P)
a
Factory setting 80.0
Settings 0.0~500.0%
This parameter determines the gain of the feedback loop. If the gain is large, the
response will be strong and immediate (If the gain is too large, vibration may occur). If
the gain is small, the response will be weak and slow.
08-02 Integral Time (I)
a
Factory setting 1.00
Settings 0.00~100.00 Sec
0.00: no integral
This parameter determines the speed of response for the PID feedback loop. If the
integral time is long, the response will be slow. If the integral time is short, the response
will be quick. Be careful not to set (I) too small, since a rapid response may cause
oscillation in the PID loop.
If the integral time is set as 0.00, Pr. 08-02 will be disabled.
08-03 Differential Time (D)
a
Factory setting 0.00
Settings 0.00~1.00 Sec
This parameter determines the damping effect for the PID feedback loop. If the
differential time is long, any oscillation will quickly subside. If the differential time is
short, the oscillation will subside slowly.
08-04 Integration’s Upper Bound Frequency
a
Factory setting 100.0
Settings 0.0~100.0%
This parameter determines the integration’s upper frequency limit while operating in the
PID feedback loop. (Limit = 01-00
×
08-04 %). During a fast Integration response, it is
possible for the frequency to spike beyond a reasonable point. This parameter will
limit this frequency spike.