Fuji Electric frenic mini series, User Manual

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H70 Overload Prevention Control
Enables overload suppressing control. If enabled, this function code is used to set the
deceleration (Hz/s).
Before the inverter enters Alarm mode due to heat sink overheat or overload (alarm code:
0H1
or
0LU
), this control decreases the output frequency of the inverter to suppress the
trip.
Data Function
0.00 Decelerate by deceleration time 1 (F08) or 2 (E11).
0.01 to 100.0 Decelerate by 0.01 to 100.0 Hz/sec.
999 Disable overload suppression control
- When overload suppressing control is enabled, the inverter decelerates the motor
according to the set deceleration rate if the temperature anywhere inside the inverter
exceeds the alarm detection level.
- Apply this control to equipment (such as pumps) whose drive frequency drops in line
with any decrease in load. If you want to proceed to drive such kind of equipment even
the inverter slows down the output frequency, enable this control.
• Do not use this function to equipment whose load does not slow if the inverter
output frequency drops, as it will have no effect.
• To avoid any conflict between overload suppressing control and any other
frequency lowering features, this control does not function if the features to
limit the output current are enabled (F43
≠
0 and H12 = 1). To force this control
to enabled status, set 0 for function codes F43 and H12.
H80 Gain for Suppression of Output Current Fluctuation
The inverter output current driving the motor may fluctuate due to the motor characteristics
and/or backlash in the load mechanism. Modify the data in function code H80 to adjust the
amount in order to suppress such fluctuation. However, as incorrect setting of this amount
may cause a much larger current fluctuation, do not modify the default setting unless it is
necessary.
- Data setting range: 0.00 to 0.20