Veichi AC90 Manual page 122

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL
ASR (VF) proportion gain: Make inverter respond quicker to load by adjust proportion gain bigger. But it is easy to
cause vibration while proportion gain is too big. Make inverter respond slower to load by adjust proportion gain smaller.
It is easy to reduce vibration while proportion gain is small.
ASR (VF) integral time: Respond to sudden changed load will be slower while integral time is long. But it is valid to
reduce vibration. General speaking, the proportion gain is adjusted firstly (as big as possible based on no system
vibration). Then adjust integral time to make system has quick respond without vibration.
ASR (VF) filter time: It is easy to be disturbed while PG card sampling. So it needs to filter.
ASR proportion gain, integral time adjustment at high/low speed: If system needs quick respond both at high and
low speed, it can set ASR(VF)switch frequency［F8.22］and［F8.26］.
Note: If proportion gain is too big and integral time is too short, the system may meets voltage fault after start
to high speed at short time (no optional resistance and break unit). It can be avoided by adjust smaller
proportion gain and longer integral time.
F8.27 ASR(VF) slip limit
It is used to limit the max slip frequency compensation. It can be properly bigger for high accuracy required or
heavy load
9.10 Tension control special parameters
F9.00 Tension setting selection
LED "0" digit: main channel selection
0: Keyboard No give
1: Keyboard pot give or modify
2: VS1 give or modify
3: VS2 give or modify
4: AS give or modify
5: PUL give or modify
6:RS485 give
LED "00" digit: Second channel selection
0: Keyboard give [F7.01] keyboard No set frequency give or modify.
Setting range:0000-0566
[F9.03] keyboard No set frequency to give or modify main channel tension
Setting range:0.0-500.0%
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Function Parameter specifications
Factory set: 100.0%
Factory set: 0000