Codesys 2.3.9 Download _best_ Jun 2026

Once you have located the legitimate CODESYS_V239_Setup.exe (or similar naming), follow this guide:

If you need help with a specific part of the setup, let me know: The exact you are trying to program. The operating system on your engineering PC.

CODESYS 2.3.9 was among the final releases of the 2.x generation, offering a stable and mature platform that remains in use today, primarily within certain industrial contexts. codesys 2.3.9 download

If you open an old project and see red text, you are likely missing a library. Check the project's "Library Manager" to see which .lib files are unaccounted for.

| Feature | CODESYS 2.3.9 | CODESYS V3.5+ | |---------|---------------|----------------| | | ~2008 | 2013–present | | IEC languages | All (IL, ST, FBD, LD, SFC, CFC) | All + OOP extensions | | 64-bit support | No | Yes | | Modern hardware | Limited (legacy only) | All new PLCs | | Git integration | No | Yes | | Security | No encryption | TLS, user management | | Best for | Maintain old machines | New development | Once you have located the legitimate CODESYS_V239_Setup

The official CODeSYS Group store is the primary source. You may need to create a free account to access the "Download Area."

Thousands of active PLCs in the field (WAGO 750 series, Eaton XC, older Schneider Electric models) were built on the V2.3 runtime. If you open an old project and see

This review is not affiliated with or endorsed by the Codesys company. The information provided is based on publicly available data and our own research.

The Ultimate Guide to CODESYS 2.3.9: Features, Applications, and How to Download What is CODESYS 2.3.9?