4-36
4-2 Function Mode
4
Functions
Momentary Power Interruption Non-stop Function
This function decelerates the Inverter by a controlled stop to avoid a trip or free running in case of
power supply disconnection or momentary power interruption during operation.
Operation Description
A If the power is disconnected during operation with the momentary power interruption non-stop
function enabled (b050 = 01) and the voltage falls below the momentary power interruption non-
stop function starting voltage (b051), the output frequency is decelerated with one stroke in
accordance with the momentary power interruption non-stop deceleration starting width (b054)
(Internal DC voltage rises due to the regenerative energy generated at this time.)
B While deceleration continues in accordance with the momentary power interruption non-stop
deceleration time (b053), internal DC voltage increases, and once the voltage reaches the stop
deceleration level of non-stop function (b052), deceleration ceases.
C Internal DC voltage decreases because there is no power supply during this constant speed
operation.
D Deceleration starts again according to b053 after the internal DC voltage decreases to b051.
Then, after a recurrence from B, the operation eventually stops without a trip.
Parameter No. Function name Data Default setting Unit
b050
Selection of non-stop function
at momentary power
interruption
00: Disabled
01: Enabled (Stop)
02: Enabled (Restart)
00 ⎯
b051
Starting voltage of non-stop
function at momentary power
interruption
0.0 to 1000. 1.0 V
b052
Stop deceleration level of
non-stop function at
momentary power
interruption
0.0 to 1000. 0.0 V
b053
Deceleration time of non-stop
function at momentary power
interruption
0.01 to 99.99
100.0 to 999.9
1000. to 3000.
1.00 s
b054
Deceleration starting width of
non-stop function at
momentary power
interruption
0.00 to 10.00 0.00 Hz
A B C D
Power supply
Internal DC
voltage
Undervoltage level
Output frequency
OFF
b052
b051
b054
b053
b053
b053
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