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 Programmable Logic Controller, PLC, or Programmable Controller is 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.

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.

AKT Input Terminals

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

Y_a = ( B_a + X_ADC ) x A_a

Y_out = B_w + (( A_w + A_h ) x Y_a )

With the following parameters:

X_ADC	Output values of the Analog Input Modules A/D converter
Y_out	Process data to the controller
B_a , A_a	Manufacturer offset and gain compensation ^‡
A_h	Manufacturer scaling: default gain ^‡
B_w , A_w	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.

AKT Output Terminals

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

Y₂ = B_w + (( A_w x A_h ) x X )

Y_dac = Y₂ x A_a + B_a

X	Controller Process data
Y_dac	Controller data to analog output module D/A converter
B_a , A_a	Manufacturer offset and gain compensation ^‡
A_h	Manufacturer scaling: default gain ^‡
B_w , A_w	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.