Download New! - Codesys 2.3.9

Test your entire program without physical hardware by toggling the "Simulation" mode under the Online menu. Moving Forward: Migration to CODESYS V3

The primary repository for software is the CODESYS Store .

Once the download is complete, run the installer and follow the on-screen instructions:

Installing CODESYS 2.3.9 on a modern 64-bit OS requires patience:

The safest and most reliable way to obtain the software is through the official vendor portal. Navigate to the (codesys.com). codesys 2.3.9 download

In addition to these standard languages, CoDeSys 2.3 offers , a non-standard graphical language that allows free positioning of function blocks, providing greater layout flexibility than standard FBD. Key Features of CoDeSys 2.3.9

Ensure CODESYS always runs with administrative privileges to read/write to the registry and system directories.

The need for continues to be high for maintaining established industrial automation infrastructure. By sourcing the software from reputable manufacturers like ifm or Turck, you can ensure that you are working with a stable, functional version of this classic IDE, ensuring your legacy machines continue to run smoothly in 2026.

A high-level, block-structured language resembling Pascal. It is ideal for complex mathematical algorithms, data processing, and iterative loops. Test your entire program without physical hardware by

The Ultimate Guide to CODESYS 2.3.9: Downloads, Features, and Legacy Guide

Manufacturers often bundle CODESYS 2.3.9 with their specific device description files (targets).

When you download standard CoDeSys from the 3S store, it only contains a generic simulation target. It cannot talk to a real physical PLC until you install the hardware manufacturer’s target support package.

CODESYS 2.3 was an "OEM" product. Many hardware manufacturers bundled the software with their hardware. You are more likely to find a working copy on a PLC manufacturer's support page than on the CODESYS site. Navigate to the (codesys

⚠️ Many untrusted websites offer “cracked” or “free” versions. Always download from the official CODESYS archive to avoid malware. A free license for 2 hours of runtime (for testing) is included; full licenses must be purchased from your PLC manufacturer.

: Often, the best way to get a stable 2.3.9 build is through PLC hardware vendors like WAGO , Eaton , or ABB . They provide customized versions of the 2.3 IDE tailored to their specific "Targets."

The defining characteristic of CoDeSys 2.3.9 is its full compliance with the IEC 61131-3 standard for programmable controllers. It supports all five standard programming languages, giving developers flexibility based on project requirements and personal expertise:

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.