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F-21
Step 1: Set the control method of Auto-restart
1) Restart after a momentary power failure
=: This function is performed when the inverter recovers from a momentary power
failure after under-voltage of the main circuit and the control circuit).
Title Function Adjustment range Default setting Setting value
Auto restart
(Motor speed search)
: Disabled
: Enabled(at power failure)
: Enabled(at ST ON/OFF)
: Enabled( + )
or
* This function is performed in retry mode regardless of the setting of this parameter.
* The function (=,,) is activated when the reset of trip or the control power is turned on.
* The function (=,) is activated when a voltage is detected in the main circuit.
2) Restart of coasting motor (Motor speed search function)
=: This function is performed when ST-CC are OFF and then connected again.
Title Function Adjustment range Default setting Setting value
Auto restart
(Motor speed search)
: Disabled
: Enabled(at power failure)
: Enabled(at ST ON/OFF)
: Enabled( + )
or
To restart the inverter in control panel operation mode, press the RUN key after a power failure.
When (Number of PG input phases) is set at (single phase) in PG feedback vector control mode (= ),
the inverter may trip (: speed error) if the direction of rotation of the motor does not agree with.
Step 2: Set the mode of Auto-restart
[Parameter setting]
Title Function Adjustment range Default setting
Auto-restart mode
(When is set at
or , set this
parameter at .)
: Speed search #1 (*1),(*2),(*3)
: Restart at coasted frequency #1 (*3)
: Restart at coasted frequency #2 (*3)
: Speed search #2 (*2),(*3)
: Special method
Model
dependent
(*1),(*2),(*3): Refer to inside of box in the next page.
: This setting is for special usage. Do not set at this.
Function
Auto-restart detect the rotating speed and direction of rotation of the motor during coasting
or momentary power failure, to ensure that the motor restarts smoothly (Motor speed
search function). With this parameter, you can also switch from commercial power
operation to inverter operation without stopping the motor.
When this function is being performed, is displayed.
Motor speed
F-CC
ON
OFF
ST-CC
ON
OFF
Input voltage
Motor speed
F-CC
ON
OFF