Analog I/O Parameters

Input Terminals

The process data that are transferred to the Bus Coupler are calculated using the following equation:

Ya = ( Ba + XADC ) x Aa

Yout = Bw + (( Aw + Ah ) x Ya )

With the following parameters:

XADC	Output values of the Analog Input Modules A/D converter
Yout	Process data to the controller
Ba , Aa	Manufacturer offset and gain compensation ‡
Ah	Manufacturer scaling: default gain ‡
Bw , Aw	User scaling: Offset and Gain as set in the Analog Input Properties (see image below).

^‡ For the thermocouple input terminals, AKT-AN-200-000 and AKT-AN-400-000, the manufacturer default gain is 160. For all other supported terminals, the manufacturer default gain is 1. The manufacturer default offset is zero for all supported terminals.

Output Terminals

The process data that are transferred to the Bus Coupler from the controller are calculated using the following equations:

Y2 = Bw + (( Aw x Ah ) x X )

Ydac = Y2 x Aa + Ba

X	Controller Process data
Ydac	Controller data to analog output module D/A converter
Ba , Aa	Manufacturer offset and gain compensation ‡
Ah	Manufacturer scaling: default gain ‡
Bw , Aw	User scaling: offset and gain as set in the Analog Output Properties (see image below).

^‡ The manufacturer default offset is zero for all supported terminals. The manufacturer default gain is 1 for all supported terminals.