Supply voltage compensation, Output voltage limitation

Function
• Supply voltage compensation: maintains a constant V/f ratio even when the input voltage fluctuates to suppress torque reduction in the low-speed range.
• Output voltage limitation: limits the output voltage so that voltage set with [vLv: Base frequency voltage 1] or more will not be output at frequency set with [vL: Base frequency 1] or more. This function is used when operating a special motor with low induced voltage.

F307 Adjustment Range:
0: Without supply voltage compensation, Limited output voltage
1: With supply voltage compensation, Limited output voltage
2: Without supply voltage compensation, Unlimited output voltage
3: With supply voltage compensation, Unlimited output voltage Selecting a setting value
• To maintain a constant V/f ratio even when the input voltage fluctuates to suppress torque reduction in the low-speed range, set [F307: Supply voltage compensation, Output voltage limitation] to "1" or "3" (With supply voltage compensation).
When [F307] is set to "0" or "2", output voltage will change in proportion to the input voltage.
• The output voltage can be limited according to the motor rating. When [F307] is set to "0" or "1", the output voltage will be limited to [vLv: Base frequency voltage 1] when operated at frequency set with [vL: Base frequency 1] or more.
• Even if [vLv] is set to the input voltage or more, the output voltage will not exceed the input voltage.
• When [Pt: V/f Pattern] is set to "2" - "6" or "9" - "12", With supply voltage compensation will be set regardless of the [F307] setting.

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.