Automatic Restart After Instantaneous Power Failure (Pr. 57, Pr. 58) - Mitsubishi Electric FR-E 500 Instruction Manual

" " Automatic restart after instantaneous power failure (Pr. 57, Pr. 58)

4.2.22 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
57
58
<Setting>
Refer to the following table and set the parameters:
Parameter
Number
0
57
58
Note: 1. Automatic restart after instantaneous power failure uses a reduced-voltage
starting system in which the output voltage is raised gradually with the preset
frequency unchanged, independently of the coasting speed of the motor.
As in the FR-A024S/A044, a motor coasting speed detection system (speed
search system) is not used but the output frequency before an instantaneous
power failure is output. Therefore, if the instantaneous power failure time is
longer than 0.2 s, the frequency before the instantaneous power failure
cannot be stored and the inverter will start at 0Hz.
2. The SU and FU signals are not output during restart but are output after the
restart cushion time has elapsed.
Factory Setting
9999
1.0 s
Setting
0.4K to 1.5K 0.5 s coasting time
2.2K to 7.5K 1.0 s coasting time
Waiting time for inverter-triggered restart after power is restored
from an instantaneous power failure. (Set this time between 0.1 s
0.1 to 5 s
and 5 s according to the inertia moment (J) and torque of the
load.)
9999 No restart
Normally the inverter may be run with the factory settings. These
0 to 60 s
values are adjustable to the load (inertia moment, torque).
Instantaneous power
failure (power failure) time
Power supply
(L , L , L )
1 2 3
STF(STR)
Motor speed
(r/min)
Inverter output
frequency
(Hz)
Inverter output
voltage
(V)
Coasting time
Pr. 57 setting
Setting Range
0 to 5 s, 9999 9999: No restart
0 to 60 s
Description
Restart
voltage
rise time
Pr. 58 setting
92
PARAMETERS
Remarks
Generally use this setting.