Trip-Less Intensification; Auto-Restart (Restart During Coasting; Motors A - Toshiba TOSVERT VF-AS1 Instruction Manual

Note 5: If you change the carrier frequency, you may need to reduce the inverter's continuous output current.
⇒ Refer to Section 1.4.4, "Current reduction curve."
Note 6: If the motor becomes overloaded when  is set to  or  (carrier frequency not decreased
automatically), an overload trip occurs.
Note 7: For the setting = or  to take effect, power needs to be turned off and then turned back on. And
this parameter is invalidated for the ratings of 90 kW and over.
Note 8: When setting  to  or , be sure to set at 4.0kHz or less.
Note 9: When setting the carrier frequency () between  and .kHz, you are recommended to set 
below 130%.
5.18

Trip-less intensification

5.18.1 Auto-restart (Restart during coasting)


Mandatory
5
• 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, "" is displayed.
1) Auto-restart after momentary power failure (Auto-restart function)
=: This function operates after power has been restored following detection of an undervoltage by the main
Title

* If the motor is restarted in retry mode, this function will operate, regardless of the setting of this parameter.
* The function (=,,,) is activated when the reset of trip or the power is turned on.
* The function (=,) is activated when an undervoltage is detected in the main circuit.
: Auto-restart control selection
• 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.
Input voltage
Motor speed
F-CC
circuits and control power.
Function
:Disabled
:At auto-restart after momentary stop
Auto-restart control
:When turning ST on or off
selection
:   + 
:At start-up
Warning
Adjustment range
E-32
E6581445
ON
OFF
Default setting Example of setting
 or 
