The objects for Codesys programming for the analog input voltage are:
C3.StatusVoltage_AnalogInput0 (object 685.3)
and C3.StatusVoltage_AnalogInput1 (object 685.4)
The analog outputs are:
C3.AnalogOutput0_DemandValue (object 634.4)
C3.AnalogOutput1_DemandValue (object 635.4)