Mitsubishi Electric FR-D720S SC EC Instruction Manual page 275

Parameter
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.
(L1, L2, L3)
frequency
The output shut off timing differs according to the load condition.
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 0.2s and the stored value cannot be retained, the inverter starts at Pr. 13
"Starting frequency" (initial value = 0.5Hz) in the starting direction upon power restoration.
FR-D700 SC EC
Power failure
Power
supply
Motor
speed
[r/min]
Output
[Hz]
Output
voltage
[V]
Coasting time
Pr. 57 Restart cushion
Fig. 6-68:
Automatic restart without frequency search
(Pr. 162 = 1/11)
time Pr. 58
Operation selection at power failure
I001901E
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