FujiFilm Frenic-Mini Instruction Manual page 93

- Trip immediately (F14 = 0)
If an instantaneous power failure occurs when the inverter is in Running mode so
that the inverter detects undervoltage of the DC link circuit, then the inverter im-
LU
mediately stops its output and displays the undervoltage alarm " " on the LED
monitor. The motor will coast to a stop and the inverter will not restart automati-
cally.
- Trip after recovery of power (F14 = 1)
If an instantaneous power failure occurs when the inverter is in Running mode,
causing the inverter to detect undervoltage of the DC link circuit, the inverter im-
mediately stops its output without transferring to Alarm mode or displaying the un-
LU
dervoltage alarm " ". The motor will coast to a stop. When the power is recov-
ered, the inverter will enter Alarm mode for undervoltage.
- Restart at the frequency at which the power failure occurred (F14 = 4)
If an instantaneous power failure occurs when the inverter is in Running mode so
that the inverter detects undervoltage of the DC link circuit, then the inverter saves
the current output frequency and stops its output to make the motor to coast to a
stop. When the power is recovered with any run command being on, the inverter
will restart at the saved frequency.
During the instantaneous power failure, if the motor speed slows down, the current
limiter function of the inverter will be activated and automatically lower the output
frequency. Upon synchronization of the output frequency and motor speed, the
inverter accelerates up to the previous output frequency. Refer to the figure (F14 =
4) given below for details.
To synchronize the output frequency and motor speed, however, the momentary
overcurrent limiter (H12 = 1) should be enabled.
This setting is optimal for operations in which the motor speed rarely slows down
due to the heavy moment of inertia of its load even if the motor coasts to a stop
because of the instantaneous power failure.
- Restart at the starting frequency (F14 = 5)
If an instantaneous power failure occurs when the inverter is in Running mode so
that the inverter detects undervoltage of the DC link circuit, then the inverter im-
mediately stops its output. After the power is recovered, entry of any run com-
mand will restart the inverter at the frequency specified by function code F23.
5-20