How is Structured Text programming done in CoDeSys?

Hi everybody,

Structured Text (ST) is one of the five programming languages defined by the IEC 61131-3 standard for programming PLCs, and it's fully supported by CoDeSys. It's a high-level, block-structured language similar to Pascal or C.

Here's a simple step-by-step guide on how to create a Structured Text program in CoDeSys:

    Create a new project: After launching CoDeSys, create a new project by selecting "File" -> "New" from the menu.

    Configure your PLC: In the "Device Tree", add your PLC by right-clicking on "Device" and selecting the appropriate model. This will depend on the PLC that you're using.

    Add a Program: Right-click on "Application" in the "Device Tree", and select "Add Object" -> "Program". Enter a name for your program and select "Structured Text (ST)" as the programming language.

    Write your program: In the text editor that appears, you can now write your Structured Text program. For example, to create a simple program that turns on a light when a switch is activated, you might write:

    IF switch THEN
        light := TRUE;
    ELSE
        light := FALSE;
    END_IF;

    Compile and Deploy: After writing your program, you can compile it by selecting "Project" -> "Build" from the menu. If there are no errors, you can then download the program to your PLC by selecting "Online" -> "Login". The specific steps to download your program will depend on your PLC.

    Run your Program: After logging in, you can run your program by selecting "Online" -> "Run". The status of your program will be displayed in the "Online" -> "Debug" view.

Remember to consult the CoDeSys manual and other resources for more detailed information on using Structured Text in CoDeSys.

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