- 112 -
Setting Range
0
：
Current running frequency
1
：
Frequency reference
2
：
Frequency upper limit
3
：
Frequency lower limit
4
：
Backup frequency for abnormality
P9-55
Backup frequency for
abnormality
Factory default
100.0%
Setting Range
0.0%
～
100.0%(max. frequency)
When a fault occurs during the inverter running and the method of handling is set to
continue running, the frequency inverter displays A** and runs at the frequency
determined by the P9-54.
When you select the backup frequency for abnormality, the value is the percentage relative
to the maximum frequency by P9-55 determine.
P9-59
No stop function selection during
instantaneous power dip
Factory
default
0
Setting Range
0
：
Invalid
1
：
Bus voltage constant control
2
：
Decelerate to stop
P9-60
Threshhold voltage of
instantaneous stop action
suspend
Factory
default
85.0%
Setting Range
80.0%
～
100.0%
（
380V type
）
100% correspond to540V
P9-61
Judging time of bus voltage
recovering from power dip
Factory
default
0.50s
Setting Range
0.00s
～
100.00s
P9-62
Threshold voltage of
instantaneous power dip judging
Factory
default
80.0%
Setting Range
60.0%
～
100.0%
（
standard bus voltage
）
This function ensures the system to run continuously at occurrence of momentary power loss
or reduce.
The inverter compensates DC bus voltage reduction with real-time energy feedback by
reducing output frequency, maintain the frequency inverter continue to run.
If P9-59=1, when the instantaneous power failure or the voltage suddenly reduces, the
frequency inverter reduces speed, when the bus voltage returns to normal, the frequency
inverter speeds up to the set frequency to run. The basis of judging bus voltage recovery is
that the bus voltage is normal and the duration is longer than the P9-61 setting time.
If P9-59=2, when the instantaneous power failure or the voltage suddenly reduces, the
frequency inverter slows down until stop.
