Parameter
No.
Function name Data
Default
data
Unit
301FHex-35H
ex
Starting Frequency
Selection at Frequency
Pull-in Restart
0: Frequency at which the power failure occur-
red
1: Maximum output frequency
2: Frequency reference
3: Starting frequency
3 -
Restart Mode after Power Interruption Operation Selection
(3008Hex-0FHex)
3004Hex-0FHex
data
Operation details
Without auto search
With auto search
*1
0: Immediately trip
If a momentary power failure occurs while the inverter is operating and an undervoltage
is detected in the Main Circuit DC V
oltage of the inverter
, the undervoltage alarm LU is
output at that time, the inverter output is cut off and the motor enters the free-run state.
1: Trip after a recov-
ery from power fail-
ure
If a momentary power failure occurs while the inverter is operating and an undervoltage
is detected in the Main Circuit DC Voltage of the inverter
, the inverter output is cut off at
that time and the motor enters the free-run state, but no undervoltage alarm is generat-
ed. During power restoration from a momentary power failure, an undervoltage alarm LU
is output.
2: Trip after deceler-
ate-to-stop
If a momentary power failure occurs while the inverter is operating and the Main Circuit
DC Voltage of the inverter falls below the continuous running level, the deceleration stop
control is started. During deceleration stop control, the kinetic energy of the moment of
inertia of the load is regenerated due to deceleration, and the deceleration operation
continues.
After the deceleration stop, the LU alarm is output.
3: Continue to run
If a momentary power failure occurs while the inverter is operating and the Main Circuit
DC Voltage of the inverter falls below the continuous running level, the operation continu-
ation control is started. During continuous running control, the kinetic energy of the mo-
ment of inertia of the load is regenerated due to deceleration, and the operation contin-
ues and power restoration is awaited. If the energy to be regenerated is low and an un-
dervoltage is detected, the inverter output is cut of
f, and the motor falls in a free-run
state.
If the RUN command is input during power
restoration, restart is performed from the
pull-in frequency. Select the pull-in fre-
quency at Starting Frequency Selection at
Frequency Pull-in Restart
(301FHex-35Hex).
If the RUN command is input during power
restoration, auto search is performed, the
motor speed is estimated, and restart is
performed from the frequency.
4: Restart based on
pull-in frequency
If a momentary power failure occurs while the inverter is operating and an undervoltage
is detected in the Main Circuit DC Voltage of the inverter
, the inverter output is cut off and
the motor enters the free-run state.
If the RUN command is input during power
restoration, restart is performed from the
pull-in frequency. Select the pull-in fre-
quency at Starting Frequency Selection at
Frequency Pull-in Restart
(301FHex-35Hex).
If the RUN command is input during power
restoration, auto search is performed, the
motor speed is estimated, and restart is
performed from the frequency.
8 Other Functions
8-43
M1 Series EtherCAT Type User’s Manual (I670)
8-4 Restart Functions
8
8-4-2 Restart after Momentary Power Failure
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