What is the purpose of tags in a PLC system?

Tags in a PLC (Programmable Logic Controller) system serve the primary function of assigning memory locations to variables used in programming. They act as identifiers for specific data points within the system, allowing programmers to refer to these data points using meaningful names rather than raw memory addresses. This enhances the readability and maintainability of control logic programs.

By using tags, programmers can easily understand the purpose of each variable, whether it represents an input from a sensor, an output to a device, or a status indicator. Tags can help in organizing the program structure, making it simpler for engineers and technicians to troubleshoot and modify the PLC code when necessary. In summary, tags facilitate clear communication of data and functions within the PLC environment, ultimately leading to more efficient programming and operation of automation systems.