Fuji Electric FRENIC MEGA G2 Series - Page 282

5.3 Description of Function Codes 5.3.1 F codes (Fundamental functions)
5-98
 Restart mode after momentary power failure (Allowable momentary power failure time) (H16)
Sets the maximum time from when momentary power failure (undervoltage level) occurs until restart (setting range:
0.0 to 30.0 s). Set coast to stop time which is allowable for machine and equipment. Momentary power failure restart
operation should be performed within the specified time, however, if the set time is exceeded, the inverter judges
the state as a power shut down, and then operates as powering on again without performing momentary power
failure restart operation.
When allowable momentary power failure time (H16) is set to “999”, momentary power failure restart is performed
until DC link bus voltage decreases by momentary power failure restart allowance voltage (50 V for 200V series,
100 V for 400V series), however, if the voltage becomes at or below the momentary power failure allowance voltage,
the state is judged as a power shut down. As a result, the inverter operates as powering ON again without performing
momentary power failure restart operating.
Power supply voltage
Allowance voltage of momentary power failure restart
200 V
50 V
400 V
100 V
The time until voltage decreases to the momentary power failure restart allowance voltage from
undervoltage differs greatly depending on the inverter capacity and with/without option.
DC link bus
voltage
Undervoltage level
Power failure
Power restoration
Power failure
period
Preparation time:
approx. 0.3 to 0.6 s
Preparation complete
Inverter
status
Gate command ON
Run command
(case 1)
(case 2)
Run command
Restart
Normal operation start