Mitsubishi Electric FR-A700 Instruction Manual page 520

Operation selection at power failure
Automatic restart operation selection (Pr. 162, Pr. 299)
● With frequency search
When "0" (initial value) or "10" is set in Pr. 162, the inverter smoothly starts after detecting
the motor speed upon power restoration. During reverse rotation, the inverter can be
restarted smoothly as the direction of rotation is detected. You can select whether to make
rotation direction detection or not with Pr. 299 "Rotation direction detection selection at
restarting". When capacities of the motor and inverter differ, set "0" (without rotation direction
detection) in Pr. 299.
Pr. 299 Setting
9999
(Initial value)
Tab. 6-97: Rotation direction direction
Automatic restart when Pr. 162 = 0, 10 (with frequency search)
Power
supply
(L1, L2, L3)
Motor
speed
[r/min]
Output
frequency
Output
voltage
speed detection time
The output shut off timing differs according to the load condition.
Power
supply
(L1, L2, L3)
Motor
speed
[r/min]
Output
frequency [Hz]/
Output
voltage [V]
speed detection time
The output shut off timing differs according to the load condition.
6 - 340
0
With rotation
direction detection
Without rotation
0
direction detection
With rotation
1
direction detection
Power failure
[Hz]
[V]
Restart cushion
Coasting time + time Pr. 58
Pr. 57
Acceleration time Pr. 611
Power failure
Acceleration time
Coasting time +
Pr. 611
Pr. 57
Pr. 78 Setting
1
Without rotation
direction detection
With rotation
direction detection
Fig. 6-157:
Under V/f control or advanced magnetic flux
vector control
Fig. 6-158:
Under real sensorless vector control
Parameter
2
Without rotation
direction detection
With rotation
direction detection
I000722C
I001602E