In the module tag Local:1:I:Data, what does "I" refer to?

In the context of the module tag Local:1:I:Data, the "I" specifically denotes the module's data type, which in this case refers to input data. In programmable controller systems, tags are structured hierarchically, with each segment providing crucial information about the module.

The first part "Local" indicates that the module is locally connected, while "1" specifies the slot number of that module in the system. The subsequent "I" signifies that this tag relates to input data, distinguishing it from other types of data or signals. Finally, "Data" indicates that the information pertains to the data aspect of the inputs being monitored or controlled.

Understanding tags is essential for programming and troubleshooting in a Programmable Logic Controller (PLC) environment, as it helps identify the type of data the module is handling and how it should be addressed during system operations.