Veichi AC90 Manual page 139

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL
Fb.03 Feedback signal gain
It is used to magnify or reduce feedback channel input signal.
Feedback signal max
Fb.04
measuring range
It is used to revise the display data of PID given and PID feedback.
For example: Under pressure control, while it is set as sensor max measuring range, it displays actual pressure.
If VS1 is feedback signal input channel, while VS1 highest limit is 9V, lower limit is 0.5V, feedback voltage is 4.5V, and
sensor measuring range is 20mpa.
Fb.05
PID output trait selections
LED "0" digit: feedback trait
0: Positive trait. It is suitable for occasions where PID feedback is bigger than PID given and requires reduce output
frequency PID to balance PID. Such as constant pressure water supply, gas supply, take-up tension control.
1: Negative trait. It is suitable for occasions where PID feedback is bigger than PID given and requires raise output
frequency PID to balance PID. Such as constant temperature control, pay-off tension control.
LED "00" digit: PID direction adjustment
0: REV forbid
1: REV permit
Inverter control output frequency after given signal and feedback signal calculation according to PID control mode
setting while receiving the run oder. If REV forbid ( [F0.07] LED "00"digit is 0 frequency control direction invalid or [F0.16]
is 2 REV forbid), inverter outputs 0.00Hz. If REV permit, inverter will change output direction, motor REV.
LED "000" digit: align
While PID setting is not at the centre point of 50%, error range of PID feedback and PID setting is non-symmetry state.
0: not centre align Not correct error.
1: centre align Correct error.
Setting range: 0.00-10.00
Setting range: 0-100.0
Display value = (4.5-0.5) × 20/(9-0.5) = 9.4mpa
Setting range: 0000-0011
134
Function Parameter specifications
Factory set: 1.00
Factory set: 100.0
Factory set: 0100