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Automatic restart (Pr. 57, Pr. 58)
PARAMETERS
3
3.8 Automatic restart (Pr. 57, Pr. 58)
3.8.1 Automatic restart after instantaneous power failure
(Pr. 57 , Pr. 58, Pr. 162 to Pr. 165)
<When vector control is exercised>
(The Pr. 162 setting "0, 1" is invalid under vector control.)
At power restoration after an instantaneous power failure, you can restart the inverter without stopping the
motor (with the motor coasting).
Parameter
Name Factory Setting Setting Range Remarks
57 Restart coasting time 9999
0 Set to 0.1s.
Extended mode
0.1 to 5s
9999 9999: No restart
58 Restart cushion time 1.0s 0 to 60s Valid for V/F control
162
Automatic restart after
instantaneous power
failure selection
0
0 0: With speed search
Valid for V/F control
("10" is valid for vector
control also)
1 1: Without speed search
10
10: Speed search
initiated per start
163
First cushion time for
restart
0s 0 to 20s
Valid for V/F control164
First cushion voltage
for restart
0% 0 to 100%
165
Restart current limit
level
150% 0 to 200%
REMARKS
When Pr. 162 = "1", the output speed before an instantaneous power failure is stored and output at the time of restart.
If the power of the inverter control circuit is lost, the output speed before an instantaneous power failure cannot be stored and
the inverter will start at 0r/min.
speed torque
Instantaneous power failure (power failure) time
Motor speed N
(r/min)
Inverter output
speed f (r/min)
Pr.57
* 0r/min when search speed is 15r/min or less.
Pr.58 is invalid under vector control
Pr.7
Power supply
(R, S, T)
Restart voltage cushion time
(Pr. 58 setting)
Instantaneous power failure (power failure) time
Instantaneous power
failure (power failure) time
Motor speed N
(r/min)
Inverter output
frequency (Hz)
Coasting time
Pr.57 +
Pr.7
Pr. 57 setting
Restart voltage cushion time
Pr. 58 setting
Pr. 162 = 0 (with speed search)
Pr. 162 = 1 (without speed search)
Motor speed N
(r/min)
Inverter output
frequency (Hz)
Speed search time
Time
Voltage
Pr.163
Pr.164
100%
Pr.58
Restart voltage cushion time
Pr. 163 = 0s, Pr. 164 = 0%
Inverter output
voltage E (V)
Inverter output
voltage E (V)
*
*
Power supply
(R, S, T)
Power supply
(R, S, T)
* The output shut off timing differs according to the load condition.