Codesys 2.3.9 ((better)) Download Jun 2026
The migration process is not automatic and can be complex. CODESYS provides a package that you can install into V3.5. This converter allows you to import V2.3 projects and attempts to translate them into the V3 format. However, several issues frequently arise:
Many older PLCs from brands like WAGO, Eaton, and Schneider Electric only support V2.3.
TwinCAT 2 is built on the CoDeSys 2.3 architecture. If you are working with older Beckhoff PLCs, download TwinCAT 2 from the Beckhoff website instead of the generic CoDeSys installer. Eaton / Moeller: Look for XSoft-Professional .
Given the difficulty of finding an official link, most users turn to unofficial sources like third-party websites, file repositories, or PLC forums (e.g., plcforum.uz.ua ). Older software files are a common vector for malware and viruses. A typical indicator for a CODESYS 2.3.9 installer file would be named something like Setup_XSOFT_CODESYS_V2.3.9_SP8.exe .
Codesys is a software tool developed by 3S-Software that enables users to program and configure industrial control systems. It is widely used in various industries, including automotive, aerospace, and industrial automation. Codesys provides a user-friendly interface for creating, testing, and debugging control programs, making it an essential tool for developers and engineers. codesys 2.3.9 download
Ensure the box for the "CODESYS Gateway Server" is checked. This background service handles the communication between your PC and the physical PLC.
As a last resort, you can use the Internet Archive’s Wayback Machine to retrieve old versions of the CODESYS website. For example, the URL http://www.codesys.com/download from around 2010–2012 often still has downloadable .exe files. The official filename for the V2.3.9 installer is usually something like CoDeSys_v23916.exe (the last two digits indicate the build number).
Because official links are sometimes hard to locate, several community‑run websites and forums provide mirrors of the CODESYS 2.3.9 installer. The most reliable among them include:
Ultimate Guide to CoDeSys 2.3.9: Downloads, Installation, and Legacy Project Management The migration process is not automatic and can be complex
Do not just save the .pro file. Go to File -> Archive -> Save/Send . This creates a zipped file containing the project file, referenced libraries, target configurations, and visualization files. Without an archive, opening the project on a different PC will result in missing library errors.
For all new projects, the only logical choice is to use the current version of CODESYS, . It is free to download and use for development and simulation from the official CODESYS Store ( store.codesys.com ).
Since CODESYS is an OEM-based software, many hardware vendors (like WAGO or Berghof) provide their own "branded" versions of 2.3.9. These are often better because they come pre-loaded with the specific Target Files (.trn) needed for their hardware. Check the 64-bit Trap:
If your manufacturer provided a specific *.target file (e.g., from ifm), you may need to install this separately to make your specific PLC visible in the program. However, several issues frequently arise: Many older PLCs
Windows 7, 8, or 10 (32/64-bit). For Windows 11, you may need to run the installer in Compatibility Mode . RAM: Minimum 512MB (2GB recommended). Disk Space: Approximately 200MB for the base installation. Installation Steps
The Ultimate Guide to CODESYS 2.3.9: Downloads, Installation, and Legacy Project Management
After the main IDE is installed, you may be prompted to install additional "Target Files" or a "Target Installer" (e.g., Setup_XC_XV_Targets_V2.3.9_SP8.exe ). These files are critical; they tell the IDE how to communicate with your specific PLC model. They contain the communication settings, the memory layout, and other hardware-specific configurations.
remains a critical legacy development system for industrial automation, particularly for hardware like ABB AC500, Turck BL20/BL67, and ifm ecomatmobile controllers . How to Download CODESYS 2.3.9
Do you have the , or are you uploading the code fresh from a physical PLC?