Hitachi WJ Series User Manual page 249

Chapter 9
■ Decelerate and stop with frequency matching and then trip ([b008] = 03)
 Detection of overcurrent or overvoltage shuts off the inverter output, and the motor runs free.
The inverter performs an active frequency matching restart at the frequency of the previous
output interruption after the retry wait time set in [b011], then decelerates the motor to stop
and outputs an "Alarm [AL]".
 For details, refer to "9.7.3 Starting with Frequency Matching".
Output current
P-N voltage
Inverter output
Motor speed
[AL] Output
■ Active frequency matching restart ([b008] = 04)
 Detection of overcurrent or overvoltage shuts off the inverter output, and the motor runs free.
The inverter then performs an active frequency matching restart after the retry wait time set in
[b011]. 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".
Output current
P-N voltage
Inverter output
Motor speed
Overcurrent detection
Overvoltage detection
Free running
Retry wait time
Overcurrent detection
Overvoltage detection
Free running
Retry wait time
9-9-16
Inverter Functions
Overcurrent
detection level
Overvoltage
detection level
Active frequency matching restart
The motor decelerates to stop after
active frequency matching is
performed, and "Overcurrent error
[E01] to [E04]" or "Overvoltage error
[E07]" occurs.
Overcurrent
detection level
Overvoltage
detection level
Active frequency matching restart