Auto-restart

Function
The motor that is coasting due to momentary power failure is accelerated immediately after the power is restored (auto-restart function).
In addition, this parameter detects the motor speed and direction of rotation of the motor during coasting at the time of startup, and allows switching from commercial power operation to inverter operation without stopping the motor(motor speed search function).

Selecting a setting value
1: Power failure
The motor that is coasting due to momentary power failure is accelerated immediately after the power is restored.
It is operated after power is restored after power circuit undervoltage is detected. Turn on the run command.
2: Terminal ST On/Off
The motor speed and direction of rotation of the coasting motor are detected to start it smoothly (motor speed search function).
The input terminal to which "ST: Standby" is assigned is turned off. It is operated when the input terminal is turned on again. Turn on the run command.
Since "ST: Standby" is always ON in default setting, make setting as follows.
• Set [F110: Always active function 1] to "0: No function"
• Assign "6: ST: Standby" to an unused input terminal
3: Terminal ST On/Off or power failure
It is operated both in "1" and "2"
4: At startup
A motor speed search is executed each time at startup.
When the motor is rotated by the external factor before running by the inverter, it can be started without trip.
• At restart, it takes about 1 second for the inverter to check the motor speed. For this reason, the startup takes more time than usual.
• Use this function when operating a system with one motor connected to one inverter. This function may not operate properly in a system configuration when multiple motors are connected to one inverter.
• When using this parameter, do not set [F605: Output phase loss detection] to "1", "2", or "4".
• When the motor is restarted from retry, this function is operated regardless of the setting of this parameter.
• It is not malfunction that abnormal noise might be heard from the motor during the motor speed search at the auto-restart.

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.