Application parameter group 10
PARAMETER DESCRIPTION 226
Power failure stop function
When 10-33(P.273) is set to 1 or 11, (and 10-09=99999), inverter decelerates to a stop when input power fail; When
10-33(P.273) is set to 2 or 12, inverter decelerates to a stop when input power fail, and if during deceleration power
comes back ON, inverter accelerates again.
Set 10-34(P.274) according to the value of load inertia. If load inertia is larger, then 10-34(P.274) should be set to a
smaller value to produce enough regenerative power, usually 3.00Hz is enough.
Motor decelerates for the time set in 10-36(P.276).( deceleration time is set to the time from 01-09(P.20)
acceleration / deceleration reference frequency to stop.)
10-38(P.278) is the switch frequency between deceleration time during input power failure 1 and deceleration time
during input power failure 2; If 10-37(P.277) is not set, motor will still decelerates for the time set to 10-36(P.276).
10-39(P.279) is UV avoidance voltage gain when 10-33(P.273) set to 11 or 12; if 10-33(P.273)=1 or 2, 10-39(P.279) is
invalid.
Undervoltage avoidance function(10-33(P.273)=11,12):
When setting 10-33(P.273)=11 or 12, frequency is decreased to prevent an undervoltage from occurring during
deceleration at input power fail.
Frequency drop trend and responsiveness can be adjusted by 10-39(P.279). If the set value is larger, the response
to bus voltage changes will be better. However, if the load inertia is large, the regenerative energy will also be
large, so 10-39(P.279) should be set smaller at this time.
Note: 1.This function is only for V/F control mode.
2.This function won’t work when using DC bus power supply
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