Toshiba TOSVERT VF-P7 Instruction Manual page 113

・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,
Step 1: Set the control method of Auto-restart
1) Restart after a momentary power failure
Input voltage
Motor speed
F-CC
★=: 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
Auto restart

(Motor speed search)
* 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)
Motor speed
F-CC
ST-CC
: This function is performed when ST-CC are OFF and then connected again.
★=
Title Function
Auto restart

(Motor speed search)
※ 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
Auto-restart mode
(When  is set at

 or , set this
parameter at .)

Adjustment range
: Disabled
: Enabled(at power failure)
: Enabled(at ST ON/OFF)
: Enabled( + )
Adjustment range
: Disabled
: Enabled(at power failure)
: Enabled(at ST ON/OFF)
: Enabled( + )
Adjustment range
: 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
(*1),(*2),(*3): Refer to inside of
: This setting is for special usage. Do not set at this.
F-21
is displayed.
ON
OFF
Default setting Setting value
 or 

ON
OFF
ON
OFF
Default setting Setting value

Default setting
dependent
box in the next page.
 or 
Model