Analog I/O Parameters

AKT2G Input Terminals

The offset and gain is applied to calculate the value converted from the analog input:

PLC Programmable Logic Controller - A digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines.
Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events. Variable Value = Analog to Digital Converter Value x Gain + Offset

Where the Gain and Offset are configured from the terminal’s I/O tab.

See E-Bus Analog I/O Data Representation for more information.

AKT2G Output Terminals

The offset and gain is applied to calculate the value to be converted to the analog output:

Digital to Analog Converter Value = PLC Variable Value x Gain + Offset

Where the Gain and Offset are configured from the terminal’s I/O tab.

See E-Bus Analog I/O Data Representation for more information.

AKT Input Terminals

The process data that are transferred to the Bus Coupler are calculated using these equations:

Ya = ( Ba + XADC ) x Aa

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

With these parameters:

Parameter	Description
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.

^‡ 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 0 (zero) for all supported terminals.

Figure 1: Analog Input Properties

AKT Output Terminals

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

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

Ydac = Y2 x Aa + Ba

With these parameters:

Parameter	Description
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.

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

Figure 2: Analog Output Properties