Trip-Less Intensification - Toshiba TOSVERT VF-FS1 Instruction Manual

6.12 Trip-less intensification

6.12.1 Auto-restart (Restart of coasting motor)
 : Auto-restart control selection
• Stand clear of motors and mechanical equipment
If the motor stops due to a momentary power failure, the equipment will start suddenly when power is
restored.
This could result in unexpected injury.
Mandatory
• Attach warnings about sudden restart after a momentary power failure on inverters, motors and
equipment for prevention of accidents in advance.
• Function
6

* If the motor is restarted in retry mode, this function will operate, regardless of the setting of this parameter.
1) Auto-restart after momentary power failure (Auto-restart function)
Setting  to  , (  ): This function operates after power has been restored following detection of an
undervoltage by the main circuits and control power.
The  parameter detects the rotating speed and rotational direction of the motor during
coasting ing the event of momentary power failure, and then after power haas been restored, restarts
the motor smoothly (motor speed search function). This parameter also allows commercial power
operation to be switched to inverter operation without stopping the motor.
During operation, "  " is displayed.
Title Function
Auto-restart control
selection
Input voltage
Motor speed
F or R command
Caution
Adjustment range
0: Disabled
1: At auto-restart after momentary stop
2: When turning ST-CC on or off
3: At auto-restart or when turning ST-CC on or off
4: At start-up
F-34
E6581381
Default setting
0
ON
OFF