Veichi AC90 Manual page 140

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL
PID feedback
highest limit 100%
PID setting 40%
PID feedback
lowest limit 0%
LED "0000" digit: reserved
Fb.06 PID preset frequency
PID preset frequency running
Fb.07
time
While it defines as PID start running, frequency ACC to PID pre-set frequency [Fb.06] according to ACC time 1. After
setting [Fb.07] time, it runs as PID closed loop trait.
Fb.08 Proportion gain: P
Fb.09 Integral time: I
Fb.10 Differential coefficient : D
Proportion gain P: It decides the impact of P act to bias. Response is quicker while gain is bigger. But there will be
surge while it is too big. Response is slower while gain is smaller.
Integral time I: It decides the size of effect of I act. Response is slower and control ability for out disturbance while I is
big. Response is quicker while I is small. But there will be surge if it is too small.
Differential coefficient D: While bias of PID feedback and PID given is changing, it adjusts change rate of output and
bias pro rata. It is related to direction and size of bias change, not related to direction and size of bias itself. Use it
carefully for it easily magnifies the disturbance.
-60%
before centre align
E=
0%
0%
after centre align
E=
40%
PID CENTRE ALIGN
Setting range: 0.00-max frequency
Setting range: 0.0-6500.0s
Setting range: 0.00-100.00
Setting range: 0.01-10.00s
Setting range: 0.00-10.00s
135
Function Parameter specifications
-50%
E=
0%
0%
E=
50%
Factory set: 50.00Hz
Factory set: 0.0s
Factory set: 1.00
Factory set: 0.10s
Factory set: 0.00s