Toshiba TOSVERT VF-AS3, Instruction Manual

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E6582062 
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6. [Advanced] How to use parameters
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6. 30. 14 Undervoltage trip setting
<F627: Undervoltage trip>
<F625: Undervoltage detection level>
<F628: Undervoltage detection time>
■ Function
This parameter sets the action when undervoltage of the power circuit is detected.
When undervoltage is detected, it displays "MOFF" and stops. Alarm can be output from the output
terminal.
If you want to trip, set by <F627: Undervoltage trip>. The trip display is "UP1".
■ Parameter setting
■ Detection level of undervoltage alarm "MOFF"
Exclude <F625: Undervoltage detection level> = "80: Auto"
The occurrence level of MOFF alarm is the setting value of <F625>. MOFF alarm will be cleared at
the setting value of <F629: Regenerative power ride-through level>.
When <F625: Undervoltage detection level> = "80: Auto"
Both occurrence level and clear level of MOFF alarm is followed by the level specified by the internal
setting.
■ Setting the <F627: Undervoltage trip>
0: Disabled
The inverter stops but does not trip. (Failure signal FL disabled)
1: Enabled
The inverter trips after undervoltage is detected for the period of time set by <F628: Undervoltage
detection time> or longer. The trip display is "UP1". (Failure FL enabled)
Title Parameter name Adjustment range Unit Default setting
F627 Undervoltage trip 0: Disabled
1: Enabled 0
F625 Undervoltage detection
level 50 - 79
80: Auto %
80
*1
*1 100% reference of <F625> is 200 V (240V class), 400 V (480V class).
F628 Undervoltage detection
time 0.01 - 10.00 s 0.03
F629 Regenerative power ride-
through level 55 - 100 % 75
0.0Hz STOP
14:01
F627 : Undervoltage trip
0: Disabled
1: Enabled