ANALOG TYPE INPUTS (Analog Input/AI)
Analog input
(AI) generic symbol
The analog input is only available on controllers with a DC voltage supply and indicated by XX VDC. Input units which accept an analog signal will also accept a digital signal (DI). The selection is made by the programmer, who can place one of the two symbols accessible in the IN tab of the function bar on the unit.
The analog input can only be placed on units I5 to I8 (or I12) of the controller. The first four units can only be used for DI type inputs.
The analog input is converted into an integer value by an 8-bit analog to digital converter. The integer value of the output is between 0 and 255.
By default, the input voltage varies between 0 and 10 V. The user can connect the input to a potentiometer with a supply between 0 and the controller supply voltage. The selection is entered in the Parameters tab in the parameterisation box of the function.
The following aliases, which can be used to define the analog inputs of the application in the edit and supervision windows, can be selected in the parameterisation box.
INPUT 0...10V
TEMPERATURE 0...10V
POTENTIOMETER 0... VDC controller power supply
In Simulation and Monitoring modes, it is possible to force (between 0 and 255) the output of the analog inputs by clicking with the right mouse button.