Acc/Dec operation after stall operation

Function
When you use lifting gear in combination with mechanical brakes, and if the output frequency is decreasing due to stall prevention operation before mechanical brake release, accelerate the mechanical brake delay time in the minimum time to prevent load from falling due to torque reduction after mechanical brake release.
This will also improve the response in inching operation, and thus preventing the load from slipping down.

Selecting a setting value

0: Acc/Dec time
When stall prevention is active, the output frequency gets low.
If stall prevention was active and the output frequency is decreasing before releasing the machine, even if the mechanical brake is released, the stall prevention remains active during the delay time of the brake operation . After delay time of the brake operation, the output current value gets low, the stall prevention operation is deactivated and the output frequency increases.
With this setting, the output frequency reaches the frequency command value after brake operation delay time + acceleration time. The actual speed of the machinery changes in sync with the output frequency.

1: Minimum time
With the same situation as in 0, the output frequency precedes and accelerates in minimum time, even when the stall prevention is active. After release of the mechanical brake, the output current is retained, and the actual speed of the machinery changes in sync with the output frequency.
This setting can prevent the load from falling, thus improving the response of the inching operation.

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.