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103
Restart operation
2
FUNCTIONS
<Setting>
Refer to the following table and set the parameters:
Parameter Setting Description
57
0
0.4K to 1.5K Coasting time of 0.5s
Generally, this setting will pose
no problems.
2.2K to 7.5K Coasting time of 1.0s
11K or more Coasting time of 3.0s
0.1 to 5s
Waiting time for inverter-triggered restart after power is restored
from an instantaneous power failure. (Set this time between 0.1
and 5s according to magnitude of the moment (J) of inertia of the
load and torque.)
- - - No restart
58 0 to 60s
Normally the motor may be run with the factory settings. These
values are adjustable to the load (moment of inertia, torque).
* The output shut off timing differs according to the load condition.
CAUTION
•Automatic restart after instantaneous power failure operation is a reduced voltage
starting system in which the output voltage is risen gradually at the preset frequency
independently of the coasting speed of the motor.
It is a system which outputs the output frequency before an instantaneous power
failure, unlike the motor coasting speed detection system (speed search system)
used by the FR-E500 series Mitsubishi transistorized inverters. Hence, if the
instantaneous power failure time is 0.2s or longer, the frequency before an
instantaneous power failure cannot be stored in memory and the inverter restarts at
0Hz.
•Keep the starting signal (STF/STR) on during instantaneous power failure when
using automatic restart after instantaneous power failure function (Pr. 57 ≠ ---). If the
starting signal turns off during instantaneous power failure, the inverter starts at 0Hz.
•The SU and FU signals are not output during a restart. They are output after
the restart cushion time has elapsed.
Instantaneous power
failure (power failure) time
STF(STR)
Motor speed
(r/min)
Inverter output
frequency
(Hz)
*
Inverter output
voltage
(V)
Coasting time
Pr. 57 setting
Restart
voltage
rise time
Pr. 58 setting
(R, S, T)
Power supply