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Hitachi WJ C1 Series

Hitachi WJ C1 Series
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Chapter 9 Inverter Functions
9-9-12
Restart with frequency matching ([b001] = 02)
Detection of an instantaneous power failure or undervoltage error shuts off the inverter output,
and the motor runs free. After the power returns, the inverter performs an active frequency
matching restart at the frequency of the previous output interruption after the retry wait time set
in [b003]. At this time, no "Alarm [AL]" is output.
For details, refer to "9.7.3 Starting with Frequency Matching".
Decelerate and stop with frequency matching and then trip ([b001] = 03)
Detection of an instantaneous power failure or undervoltage error shuts off the inverter output,
and the motor runs free. After the power returns, the inverter performs an active frequency
matching restart at the frequency of the previous output interruption after the retry wait time set
in [b003], then decelerates the motor to stop and outputs an "Alarm [AL]".
For details, refer to "9.7.3 Starting with Frequency Matching".
Active Frequency matching restart ([b001] = 04)
Detection of an instantaneous power failure or undervoltage error shuts off the inverter output,
and the motor runs free. After the power returns, the inverter performs an active frequency
matching restart after the retry wait time set in [b003]. At this time, no "Alarm [AL]" is output.
For details on active frequency matching restart, refer to "9.7.4 Starting with Active Frequency
Matching".
Undervoltage time
Free running
Inverter output
P-N voltage
Undervoltage level
Undervoltage detection
Power
Retry wait
time
Motor speed
Active frequency matching
restart
Instantaneous power
failure/undervoltage
allowed time
[UV] Output
Free running
Inverter output
[AL] Output
P-N voltage
Undervoltage level
Undervoltage detection
Power
Retry wait
time
Motor speed
Active frequency matching restart
The inverter decelerates the motor
to stop after active frequency
matching is performed, and
"Undervoltage error [E09]" occurs
Undervoltage time
Instantaneous power
failure/undervoltage
allowed time
[UV] Output
Free running
Inverter output
P-N voltage
Undervoltage level
Undervoltage detection
Power
Retry wait
time
Motor speed
Active frequency matching restart
Undervoltage time
Instantaneous power
failure/undervoltage
allowed time
[UV] Output

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