Millivolts/Volt

Type:	Axis Status Register
Address:	RMC70: n/a RMC150: n/a RMC200: %MDn.26, where n = 256 + the axis number
System Tag:	_Axis[n].MillivoltsPerVolt
How to Find:	Axes Status Registers Pane, All tab:Feedback
Data Type:	REAL
Units:	mV/V

Description

The Millivolts/Volt status register is the feedback value from a load cell. It is calculated as follows:

Millivolts/Volt = Millivolt Input / Exciter Voltage

The Exciter Voltage depends on the Exciter Mode:

Nominal

The Exciter Voltage is the value of the load cell input module’s Exciter Output as measured during the factory calibration process. For the LC8 module, the value may be in the range of 6.75 ±0.003 V. For more details, see LC8 Calibration.

Adaptive

The Exciter Voltage is the Effective Exciter Voltage, which uses the voltage of the Sense pin to calculate the actual excitation voltage at the load cell, to compensate for voltage drop.

Fixed

The Exciter Voltage is the Fixed Exciter Voltage. This is the value the user obtained by measuring the excitation voltage at the load cell.

The Millivolts/Volt status register is used to calculate the Actual Force of a load cell as follows:

If (Millivolts/Volt + Millivolts/Volt Offset) < 0 Then

Force = (Millivolts/Volt + Millivolts/Volt Offset) x NegCorrFactor x Force Scale + Force Offset

Else

Force = (Millivolts/Volt + Millivolts/Volt Offset) x Force Scale + Force Offset

EndIf