Codesys: 2.3.9 Download [better]

CODESYS (Controller Development System) is a powerful, vendor-independent IEC 61131-3 programming environment for PLCs (Programmable Logic Controllers). Originally developed by the German company 3S-Smart Software Solutions GmbH, now known as the CODESYS Group, the platform has a long history, with version 1.0 released in 1994.

Version 2.3.9 represents the mature, highly stable final iterations of the 2.x branch. It is a complete development tool used for configuring, programming, and testing industrial control applications. Supported IEC 61131-3 Programming Languages

This guide provides a comprehensive overview of how to find, download, install, and use CODESYS 2.3.9 in 2026. What is CODESYS 2.3.9?

After installation, you may need to activate CODESYS 2.3.9 using a license key. This key is usually provided by the software vendor or an authorized distributor.

Because the official download portal has removed V2.3 archives, you have two primary options: codesys 2.3.9 download

Provides CODESYS Version 2.3.9.35 free for use with Turck hardware .

Are you trying to or start a brand-new project? Share public link

If you are developing a brand-new automation system, you should look toward the future rather than building on the 2.3 platform. CODESYS V3 (currently V3.5) features modern object-oriented programming (OOP), an enhanced multi-device project structure, a completely overhauled visualization engine, and improved cybersecurity integrations. Using the Project Converter

: Since CODESYS V3 is the current standard, use the store's search bar to specifically look for "CODESYS V2.3." It is often listed as a legacy engineering tool. It is a complete development tool used for

Why you might want it

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

Many distributors host the installer on their support pages for customers. Ensure you are downloading from a reputable source to avoid malware or corrupted .exe files. Step-by-Step Installation Guide

Even though the software is free, you must complete a $0.00 checkout process to receive the official download link in your account dashboard. 2. Device Manufacturer Websites After installation, you may need to activate CODESYS 2

To download Codesys 2.3.9, follow these steps:

: You will need to sign in or register on the CODESYS Store to gain access to the download link.

If the IDE closes unexpectedly on modern operating systems, right-click the CODESYS desktop shortcut, go to , check the box for "Run this program in compatibility mode for," and select Windows 7 .

Once installed, setting up your first project takes only a few minutes: Launch the CODESYS 2.3 application. Click .

While CODESYS 2.3.9 is obsolete technology, it remains a vital utility for the operational technology (OT) sector. Acquiring the software requires navigating official archives or hardware vendor repositories.

| Requirement | Details | |-------------|---------| | | Windows XP, Vista, 7 (32-bit). Windows 10/11 64-bit requires a virtual machine (e.g., VirtualBox or VMware) running Windows 7 32-bit. | | Target PLCs | Any CODESYS V2.3 runtime (e.g., Wago 750-841, Beckhoff BC/BX series, older Eaton XC). | | Programming Languages | IL, ST, FBD, LD, SFC (CFC is optional). |