Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 792 / 1218

(A) Application parameters Parameters
5 - 590
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
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.)
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).
Pr. Name
Initial
value
Setting
range
Description
57
A702
Restart coasting time 9999
0 No coasting time
0.1 to 30 s
Set the waiting time for the inverter to perform a
restart after restoring power due to an instantaneous
power failure.
9999 No restart
162
A700
Automatic restart after
instantaneous power
failure selection
0
0, 1, 2, 3 Frequency search only performed at the first start
10, 11, 12,
13
Frequency search at every start
611
F003
Acceleration time at a
restart
9999
0 to 3600 s
Set the acceleration time to reach Pr. 20 "Acceleration/
deceleration reference frequency" at restart.
9999
Standard acceleration time (for example, Pr. 7) is
applied as the acceleration time at restart.
Fig. 5-292:
IPF signal
I001353E
PM PM PM
15 ms to 100 ms*
Power
supply
ON OFF
OFF ON
* 10 to 100 ms for IP55 compatible models