Toshiba VF-FS1 - Manual (Page 127)

E6581381
F-31
6
6.12 Trip-less intensification
6.12.1 Auto-restart (Restart of coasting motor)
H : Auto-restart control selection
Caution
Mandatory
• 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.
• Attach warnings about sudden restart after a momentary power failure on inverters, motors and
equipment for prevention of accidents in advance.
• Function
The H 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, "TVT[" is displayed.
Title Function Adjustment range Default setting
H
Auto-restart control
selection
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
0
* 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)
Input voltage
Motor speed
F or R command ON
OFF
+ Setting H to , (): This function operates after power has been restored following detection of an
undervoltage by the main circuits and control power.