Power

From the Power screen, you can view and configure the drive power settings as follows.

Button or Dialog Box	Description	Parameter
VBus	Reads the current DC bus voltage.	VBUS.VALUE
Over Voltage Fault Level	Reads the over voltage fault level.	VBUS.OVFTHRESH
Under Voltage Fault Level	Reads the under voltage fault level.	VBUS.UVFTHRESH
Operating Voltage	Sets the operating voltage.	VBUS.ACNOMINAL
Under Voltage Fault Mode	Sets under voltage mode.	VBUS.UVMODE

See Regeneration for more information about regen resistors and sizing regen resistors. 

Operating Voltage

Operating voltage can be selected by the user to allow 480VAC drives to work on 240VAC input supplies.

The VBUS.ACNOMINAL parameter has an effect on the following voltage-thresholds:

1. DC-bus over-voltage threshold (see VBUS.OVFTHRESH).
2. The regen-resistor enable/disable voltage thresholds.
3. The inrush-relay enable/disable voltage thresholds.

A power-cycle is needed after changing the value and saving the parameter on the NV memory of the Drive, since the voltage thresholds mentioned above are read during the boot-sequence of the drive.