Toshiba Tosvert VF-AS1 - Manual (Page 97)

E6581301
E-31
5
5.18 Trip-less intensification
5.18.1 Auto-restart (Restart during coasting)
WXU : Auto-restart control selection
Warning
Mandatory
• Do not go near motors and equipment.
Motors and equipment that have stopped temporarily after momentary power failure will restart
suddenly after recovery. 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
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). This parameter also
allows commercial power operation to be switched to inverter operation without stopping the motor.
During operation, “TVT[” is displayed.
1) Auto-restart after momentary power failure (Auto-restart function)
Input voltage
Motor speed
F-CC
ON
OFF
+WX =: This function operates after power has been restored following detection of an undervoltage by the main
circuits and control power.
Title Function Adjustment range Default setting Example of setting
WXU
Auto-restart control
selection
:Disabled
:At auto-restart after momentary stop
:When turning ST on or off
:  +
:At start-up
or
* If the motor is restarted in retry mode, this function will operate, regardless of the setting of this parameter.
* The function (WXU=,,,) is activated when the reset of trip or the control power is turned on.
* The function (WXU=,) is activated when an undervoltage is detected in the main circuit.