Automatic Restart After Instantaneous Power Failure - Mitsubishi Electric FR-A820-00046 Instruction Manual

(A) Application parameters
5.14.15 Automatic restart after instantaneous power failure/flying start with an IPM
motor
When using the IPM motor MM-CF, the inverter operation can be restarted without stopping the mo-
tor operation.
When the automatic restart after instantaneous power failure function is selected, the motor driving
is resumed in the following situations:
– When power comes back ON during inverter driving after an instantaneous power failure
– When the motor is coasting at start
Pr.
57
A702
162
A700
611
F003
Automatic restart after instantaneous power failure function
● The inverter output is shut off at the activation of the instantaneous power failure protection
(E.IPF) or undervoltage protection (E.UVT). (Refer to page page 6-10 for E.IPF or E.UVT.)
● When E.IPF or E.UVT is activated, the instantaneous power failure/undervoltage (IPF) signal is
output.
● The IPF signal is assigned to terminal IPF in the initial status. By setting "2 (positive logic) or 102
(negative logic)" in any of Pr. 190 to Pr. 196 (output terminal function selection), the IPF signal can
be assigned to another terminal.
● When the automatic restart after instantaneous power failure function is selected, motor driving
is resumed at the power restoration after an instantaneous power failure or undervoltage. (E.IPF
and E.UVT are not activated.)
supply
* 10 to 100 ms for IP55 compatible models
Connection (CS signal)
● Restart is enabled at turn-ON of the automatic restart after instantaneous power failure/flying
start (CS) signal.
● The inverter operation is disabled at turn-OFF of the CS signal while Pr. 57 "Restart coasting time"
≠"9999" (with restart).
5 - 590
PM PM PM
Name
Restart coasting time
Automatic restart after
instantaneous power
failure selection
Acceleration time at a
restart
15 ms to 100 ms*
Power
ON OFF
OFF
Initial Setting
Description
value range
0 No coasting time
Set the waiting time for the inverter to perform a
9999 0.1 to 30 s restart after restoring power due to an instantaneous
power failure.
9999 No restart
0, 1, 2, 3 Frequency search only performed at the first start
0
10, 11, 12,
Frequency search at every start
13
Set the acceleration time to reach Pr. 20 "Acceleration/
0 to 3600 s
deceleration reference frequency" at restart.
9999
Standard acceleration time (for example, Pr. 7) is
9999
applied as the acceleration time at restart.
Fig. 5-292:
IPF signal
ON
Parameters
I001353E