Toshiba Tosvert VF-AS1 - Manual (Page 98)

E6581301
E-32
5
2) Restarting motor during coasting (Motor speed search function)
Motor speed
F-CC
ON
OFF
ST-CC
ON
OFF
+WXU =: This function operates after the ST-CC terminal connection has been opened first and then connected
again.
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 
* To restart the inverter in operation panel operation mode, press RUN key after a power failure.
* When H (Number of PG input phases) = (single phase) in PG feedback vector control mode (RV=, ), the
inverter may trip (G: speed error) if the direction of rotation of the motor does not agree with.
Operation and application of the auto-restart function
• By using retry function H together, auto restart function can be actuated at the time of tripping.
Application to a crane or hoist
The crane or hoist may have its load moved downward during the above waiting time from input of the operation starting
command to the restart of the motor. To apply the inverter to such machines, therefore, set the auto-restart control mode
selection parameter WXU to “” (Disabled). And avoid using the retry function.
• At restart, it takes about 2~4 sec. for the inverter to check to see the number of revolutions of the motor. For this reason, the
start-up takes more time than usual.
• When the auto restart function is selected, this function is actuated also at time of activation of motor and at the first
operation after the reset of tripping. The operation will restart after the waiting time passes.
• Use this function when operating a system with one motor connected to one inverter. This function may not operate
properly in a system configuration with multiple motors connected to one inverter.