What happens when voltage is applied to input terminal Local: 1:1.Data.0 of a PLC?

When voltage is applied to the input terminal Local: 1:1.Data.0 of a PLC, this typically indicates that the input has been energized or activated. The PLC processes this signal as a change in the state of the input. In the context of a programmed XIC (Examine if Closed) instruction that references the same address, if the input terminal is receiving voltage (making it 'true' or active), the XIC instruction will evaluate to 'true.'

This means that the XIC instruction, which is designed to 'open' or complete a circuit when the corresponding bit is 'true', will operate as intended. As a result, this leads to the conclusion that the XIC instruction will open when voltage is applied to that input terminal, enabling control actions based on the logic of the PLC program.

Understanding this behavior is crucial in programming PLCs, as it allows for the proper interpretation of how input signals influence the operation and flow of logic within the control system.