Command GetDACVoltage :

It returns the last Voltage that has been send to hardware

GetDACVoltage Definition
Input Argument	Tango::DEV_VOID
Output Argument	Tango::DEV_DOUBLE	Last Set DAC Voltage
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..