Mitsubishi FR-E520-0.1KN - Automatic Restart after Instantaneous Power Failure (Pr. 57, Pr. 58)

PARAMETERS
95
4.2.18 Automatic restart after instantaneous power failure
(Pr. 57, Pr. 58)
Pr. 57 "restart coasting time"
Pr. 58 "restart cushion time"
"
You can restart the inverter without stopping the motor (with the motor coasting)
when power is restored after an instantaneous power failure.
Parameter Number Factory Setting Setting Range Remarks
57 9999 0 to 5 s, 9999 9999: No restart
58 1.0 s 0 to 60 s
<Setting>
Refer to the following table, and set the parameters:
Parameter
Number
Setting Description
0.1K to 1.5K 0.5 s coasting time
0
2.2K to 7.5K 1.0 s coasting time
Generally use this setting.
0.1 to 5 s
Waiting time for inverter-triggered restart after power is
restored from an instantaneous power failure. (Set this
time between 0.1 second and 5 seconds according to
the inertia moment (GD
2
) and torque of the load.)
57
9999 No restart
58 0 to 60 s
Normally the inverter may be run with the factory
settings. These values are adjustable to the load (inertia
moment, torque).
Note:1. Automatic restart after instantaneous
p
ower failure uses a reduced-volta
g
e
startin
g
s
y
stem in which the out
p
ut volta
g
e is raised
g
raduall
y
with the
p
reset
frequency unchanged, independently of the coasting speed of the motor.
As in the FR-A024, a motor coastin
g
s
p
eed detection s
y
stem
(
s
p
eed search
s
y
stem
)
is not used but the out
p
ut fre
q
uenc
y
before an instantaneous
p
ower
failure is out
p
ut. Therefore, if the instantaneous
p
ower failure time is lon
g
er
than 0.2 seconds, the fre
q
uenc
y
before the instantaneous
p
ower failure
cannot be stored and the inverter will start at 0Hz.
2. The SU and FU si
g
nals are not out
p
ut durin
g
restart but are out
p
ut after the
restart cushion time has elapsed.
CAUTION
When automatic restart after instantaneous power failure has been
selected, the motor and machine will start suddenly (after the reset time
has elapsed) after occurrence of an instantaneous power failure.
Stay away from the motor and machine.
When you have selected automatic restart after instantaneous power
failure, apply the supplied CAUTION seals in easily visible places.
When the start signal is turned off or the
STOP
RESET
key is pressed during the
cushion time for automatic restart after instantaneous power failure,
deceleration starts after the automatic restart cushion time set in Pr. 58
"cushion time for automatic restart after instantaneous power failure"
has elapsed.
4