DIGITAL INPUT
Digital input (DI) generic symbol
Digital input is available on all types of controllers. For XX VDC type controllers with input units which accept a digital signal and an analog signal (AI), 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 following aliases, which can be used to define the digital inputs of the application in the edit and supervision windows, can be selected in the Parameterisation box.
In edit mode, the symbols are displayed in the OFF state.
OFF ON Type DIGITAL INPUT CONTACT LIMIT SWITCH PROXIMITY SENSOR PRESENCE DETECTOR ILLUMINATED PUSHBUTTON SELECTOR SWITCH PUSHBUTTON NORMALLY OPEN RELAY
In Simulation and Monitoring modes it is possible to force the digital input signals to the ON state by clicking on the symbol or by clicking with the mouse (right-hand button) on the output or on the output connection. In this case, the input symbol is displayed as shown in the previous table. Clicking again on the symbol forces it to the OFF state.