CODESYS 2.3.9 (specifically version 2.3.9.x) legacy development system is available for download through several official channels, primarily depending on the hardware manufacturer you are using. While CODESYS V3 is the current standard, V2.3 remains in a "service phase" for maintenance of existing industrial controllers. CODESYS Group Official Download Sources
If the UI looks scaled incorrectly, right-click the CODESYS icon > Properties > Compatibility > Change high DPI settings. Conclusion
CoDeSys 2.3 is one of the most successful IEC 61131-3 programming systems in industrial automation history. While CoDeSys V3 dominates modern hardware, thousands of legacy systems worldwide still run on the CoDeSys 2.3 runtime.
Because CoDeSys 2.3 relies entirely on hardware targets, PLC manufacturers often bundle the CoDeSys 2.3.9 IDE directly with their own target installers. codesys 2.3.9 download
Despite its age, CODESYS 2.3.9 remains a powerful IEC 61131‑3 programming environment. Its main features include:
CODESYS 2.3.9 was designed during an older era of computing. Consequently, running it on modern IT infrastructure requires careful planning. System Specifications 1 GHz Intel Pentium or AMD equivalent processor. RAM: Minimum 512 MB (1 GB or more recommended).
: It is highly recommended to temporarily disable antivirus software during installation to prevent blocks on communication drivers. CODESYS 2
Because CODESYS 2.3 is often customized by hardware vendors, the best way to get the correct version is through these official portals: IFM ecomatmobile : Offers a full CODESYS 2.3 package (V2.3.9.42)
CODESYS V2.3 (specifically version 2.3.9) , you typically need to download it through a hardware partner or the official manufacturer portal, as this legacy version is often bundled with specific PLC target files. 📥 Official Download Sources
Because version 2.3 is legacy software, it does not receive modern cybersecurity updates. For this reason, to prevent insecure deployments. How to Safely Acquire CODESYS 2.3.9 Conclusion CoDeSys 2
CODESYS 2.3.9 Download: The Complete Guide to the Legacy PLC Standard
CODESYS GmbH officially discontinued support for V2.3 at the end of 2019. All new developments – including new libraries, new drivers, and new runtime systems – are created exclusively for V3.5. For this reason, many engineers eventually need to .