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Chapter 6 ,P9 Failure and protection
P9-54
Continue to run
frequency selection
when fault occurs
0: Run at the current operating frequency
1: run at the set frequency
2: Run at the upper limit frequency
3: Run at the following frequency limit
4: Run at abnormal standby frequency
Default
：
0
P9-55
Abnormal backup
frequency
60.0%
～
100.0%
（
100.0% Maximum frequencyP0-10
）
Default
：
100.0%
When a fault occurs during the operation of the inverter and the fault is handled in the
continuous mode, the inverter displays A** and operates at the frequency determined by
P9-54.
When the abnormal standby frequency is selected, the value set by P9-55 is the
percentage relative to the Maximum frequency.
P9-59
Instantaneous power
failure action selection
0
：
Invalid 1: Deceleration 2: Deceleration
stop
Default
：
0
P9-60
Reserved
P9-62
～
100.0%
Default
：
100.0%
P9-61
Instantaneous power
failure voltage rise
judgment time
0.00s
～
100.00s
Default
：
0.50s
P9-62
Instantaneous power
failure action judgment
voltage
60.0%
～
100.0%(standard bus voltage)
Default
：
80.0%
This function means that when the instantaneous power failure or sudden voltage drop
occurs, the inverter compensates the DC bus voltage of the inverter by reducing the output
speed and reducing the output voltage of the inverter to maintain the inverter running.
If P9-59=1, the inverter will decelerate when the power is suddenly lost or the voltage
suddenly drops. When the bus voltage returns to normal, the inverter will accelerate to
the set frequency. The basis for judging that the bus voltage returns to normal is that the
bus voltage is normal and the duration exceeds the set time of P9-61. If P9-59=2, the
inverter decelerates until the shutdown occurs in the event of an instantaneous power
failure or sudden voltage drop
