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PARAMETERS
5
Operation selection at power failure and instantaneous power failure
(4) Operation continuation at instantaneous power failure function (Pr. 261 = "2")
When power is restored during deceleration after a power failure, acceleration is made again up to the set frequency.
When this function is used in combination with the automatic restart after instantaneous power failure function(Pr.57
≠
"9999"), deceleration can be made at a power failure and acceleration can be made again after power restoration.
∗ Acceleration time depends on Pr. 7 (Pr. 44).
NOTE
When operation continuation at instantaneous power failure function is used, keep the starting signal (STF/STR) ON
even during instantaneous power failure. If the starting signal turns OFF during instantaneous power failure, the
inverter decelerates according to the deceleration time setting, causing the motor to coast if enough regenerative
energy is not obtained.
REMARKS
During a stop or trip, the power failure stop selection is not performed.
CAUTION
Even if the power failure stop function is valid, some loads may cause the inverter to trip and the motor to
coast. The motor will coast if enough regenerative energy is not given from the motor to the inverter.
Parameters referred to
Pr. 57 Restart coasting time Refer to page 151
During deceleration at
occurrence of power failure
Reacceleration *
Time
When power is restored during deceleration
at occurrence of power failure
Output
frequency
IPF
Power
Pr. 261 = 2
Time
Output
frequency
Automatic restart
after instantaneous
power failure
Reset time + Pr. 57
When used with automatic restart
after instantaneous power failure
During power failure
Power
Pr. 261 = 2, Pr. 57 9999
During deceleration at
occurrence of power failure