Which PLC programming language is known to be difficult to troubleshoot?

Structured Text is often considered more difficult to troubleshoot compared to other PLC programming languages. This is primarily due to its high-level, text-based coding style, which resembles traditional programming languages such as Pascal or C. While this allows for more complex operations and better control structures, it can also lead to less intuitive debugging, particularly for those who may not have a programming background.

When troubleshooting structured text, identifying syntax errors or logical flaws requires a good understanding of programming concepts and the specific implementation in the PLC environment. This can be more challenging compared to visual representations like Ladder Logic, where the flow of control can be easier to follow due to its graphical nature. In addition, the lack of visual feedback in Structured Text makes it harder to determine the state of variables at any point in time. Overall, these factors make troubleshooting in Structured Text a more complex endeavor.