Mitsubishi Electric FR-E700 Instruction Manual page 310

Operation selection at power failure
● 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. (The motor capacity should be equal to or one rank lower than
the inverter capacity.)
When using the frequency search, perform offline autotuning. (Refer to page 6-90 for ad-
vanced magnetic flux vector, general-purpose magnetic flux vector control and page 6-160
for V/F control.)
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. 6-40: Rotation direction detection
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.
6 - 156
0
With rotation
direction detection
Without rotation
0
direction detection
With rotation
1
direction detection
Power failure
a
[Hz]
[V]
Restart cushion
time Pr. 58
Coasting time +
Pr. 57
Acceleration time Pr. 611
Pr. 78 Setting
1
Without rotation
direction detection
Without rotation
direction detection
With rotation
direction detection
Fig. 6-80:
Automatic restart with frequency search
(Pr. 162 = 0/10)
Parameter
2
Without rotation
direction detection
Without rotation
direction detection
With rotation
direction detection
I000722C