Attention

IronPLC can only run very simple programs. The steps described are accurate but many language features are not yet supported.

Check TwinCAT 3 Projects

This guide shows how to use IronPLC to check a Beckhoff TwinCAT 3 project for correctness.

Note

This guide assumes you have installed the IronPLC Compiler. See Installation if you have not already installed it.

Check with the VS Code Extension

  1. Open your TwinCAT project folder in VS Code.

  2. Open any TwinCAT source file.

  3. The extension highlights errors and warnings in the editor as you type.

Check with the Command Line

You can check individual TwinCAT files:

ironplcc check MyProgram.TcPOU

Or check an entire TwinCAT project by pointing to the directory containing the .plcproj file. IronPLC reads the project file to discover which source files to analyze:

ironplcc check path/to/my-twincat-project

See TwinCAT for supported file types and format details.