Mitsubishi Electric FR-F820-00046, Instruction Manual

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(A) Application parameters Parameters
5 - 436
Continuous operation function at instantaneous power failure (Pr. 261 = "2, 12, 22")
●
The motor re-accelerates to the set frequency if the power restores during the deceleration to stop.
●
Combining with the automatic restart after instantaneous power failure function enables a power
failure time deceleration stop and re-acceleration at a power restoration.
If the power is restored after stoppage by a power failure, a restart operation is performed when
automatic restart after instantaneous power failure (Pr. 57
≠
"9999") is selected.
Undervoltage avoidance function (Pr. 261 = "11, 12", Pr. 294)
●
If "11, 12" is set to Pr. 261, the deceleration time is adjusted (shortened) to prevent an undervoltage
from occurring during deceleration at occurrence of power failure.
●
Adjust the downward frequency slope and the response level using Pr. 294 "UV avoidance voltage
gain". Setting a large value improves the response to the bus voltage.
I002720E
Fig. 5-216: Operation continuation at instantaneous power failure
IPF
Y46
Y46
When power is restored during
deceleration at occurrence of power failure
Pr. 261 = 2
Power
supply
Output
frequency
During deceleration
at occurrence of
power failure
Reacceleration *
Time
* Acceleration time depends on Pr. 7 (Pr. 44 ).
Power
supply
During deceleration
at occurrence of
power failure
Output
frequency
During power failure
Pr. 261 = 2, Pr. 57
≠
9999
When used with automatic restart
after instantaneous power failure
Automatic restart
after instantaneous
power failure
Time