Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 309 / 608

Parameter Operation selection at power failure
FR-E700 SC EC/ENE 6 - 155
Automatic restart after instantaneous power failure operation (Pr. 30, Pr. 162, Pr. 299)
●
Without frequency search
When Pr. 162 = "1" (initial value) or "11", automatic restart operation is performed in a reduced
voltage system, where the voltage is gradually risen with the output frequency unchanged from
prior to an instantaneous power failure independently of the coasting speed of the motor.
햲
The output shut off timing differs according to the load condition.
Fig. 6-79:
Automatic restart without frequency search
(Pr. 162 = 1/11)
I001901E
NOTE This system stores the output frequency and rotation direction prior to an instantaneous power
failure and restart using the stored value. Therefore, if the instantaneous power failure time
exceeds 0.2 s and the stored value cannot be retained, the inverter starts at Pr. 13 "Starting fre-
quency" (initial value = 0.5 Hz) in the starting direction upon power restoration.
Power
supply
(L1, L2, L3)
Motor
speed
[r/min]
Output
frequency
[Hz]
Output
voltage
[V]
Power failure
Coasting time
Pr. 57 Restart cushion
time Pr. 58
a