No. (Hex.) Name Description Default (Range) C4-25 (1BF4) Expert High-Speed Voltage Compensation Sets the voltage compensation function for high-speed operation. Usually it is not necessary to change this setting. Determined by A1-02 (0, 1) 0 Disabled 1 Enabled Note: Set C4-25 = 0 when there is audible noise or motor vibration during high-speed operation.