Mitsubishi Electric FR-F820-00077 Instruction Manual page 592

(A) Application parameters
Restart operation without frequency search (Pr. 162 = "1, 11")
When Pr. 162 = "1 or 11", reduced voltage start is used for the restart operation. In this method, the
voltage is raised gradually while keeping the output frequency level at the level before the instanta-
neous failure, regardless of the motor's coasting speed.
Fig. 5-208:
NOTE This restart method uses the output frequency that was active before the instantaneous power
failure stored in memory. If the instantaneous power failure time is 0.2 s or more, the output fre-
quency can no longer be stored and held in memory, so the restart is performed from Pr. 13 "Start-
ing frequency" (initial value is 1.5 Hz).
Restart at every start (Pr. 162 = "10 to 13")
When "10 to 13" is set in Pr. 162, a restart operation is performed at each start and automatic restart af-
ter instantaneous power failure (Pr. 57 start after the reset time has elapsed). When "0 (initial value) to
3" is set in Pr. 162, a restart operation is performed at the first start after a power-ON, and from the sec-
ond power-ON onwards, a start from the starting frequency is performed.
Automatic restart operation of MRS (X10) signal
The restart operation after restoration from output shutoff by the MRS (X10) signal is as shown in the
table below according to the Pr. 30 setting.
2, 10, 11, 102, 110, 111
Other than the above
Tab. 5-203: Operation selection after output shutoff
NOTES When output is shut off using safety stop function (terminals S1 and S2), the inverter restarts in the
same way as when output is shut off by MRS (X10) signal.
5 - 420
V/F control, Advanced magnetic flux vector control
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f (Hz)
Inverter output
voltage E (V)
Coasting time
Pr. 57 setting
* The output shut off timing differs according to the load condition.
Automatic restart without frequency search (Pr. 162 = 1/11)
Pr. 30 setting Operation after restoration from output shutoff by the MRS (X10) signal
Restart operation (starting from the coasting speed)
Starting from Pr.13 Starting frequency.
Instantaneous (power failure) time
∗
Restart cushion time
(Pr. 58 setting)
Parameters
I002714E