E6581528
E-33
5
2) Restarting motor during coasting (Motor speed search function)
Motor speed
F-CC
ON
OFF
ON
OFF
S3 (ST operation standby
signal) -CC
=: This function operates after the S3-CC terminal connection has been opened first and then connected
again.
Title Function Adjustment range Default setting
Example of setting
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 (Number of PG input phases) = (single phase) in PG feedback vector control mode (=, ),
the inverter may trip (: speed error) if the direction of rotation of the motor does not agree with.
=: When either =or =, or both conditions consist, it operates.
=: It detects the motor speed at every time when motor is starting. It is effective to drive a motor when the
motor has been running by outside factor while not being driving the motor in the inverter. It is possible to start
smoothly by auto-restart control. However, please note that it is not likely to be able to speed detection when the
residual voltage doesn't remain in the motor.
Operation and application of the auto-restart function
• By using retry function 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 to “” (Disabled). And avoid using the retry function.
• At restart, it takes several seconds. 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.
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