In the Studio 5000 software, which type of tag is used to identify the PLC's actual I/O terminals?

Module-defined tags in the Studio 5000 software are specifically designed for identifying the actual I/O terminals on a Programmable Logic Controller (PLC). These tags are automatically created based on the hardware configuration of the PLC, reflecting the physical I/O modules connected to the system. This means that they provide a direct mapping from the software to the hardware, allowing for streamlined management and a clear understanding of which I/O terminals correspond to which aspects of the control process.

The use of module-defined tags is particularly beneficial in complex control environments, as it simplifies troubleshooting and monitoring operations. By offering a clear reference to the actual physical components, operators and programmers can easily correlate the software configuration with hardware setups.

In contrast, program-defined tags are variables created within the program that do not directly correspond to physical I/O, user-defined tags can be customized by the user for specific applications, and system-defined tags refer to tags that the system generates automatically for internal processes. While each of these tag types has its unique use case, module-defined tags are essential for accurately representing and interfacing with the PLC's I/O system.