CODESYS® Releases & Updates

CODESYS Release & Teaser Notes

LD FBD

March 03, 2026

Latest version: 4.7.0.0

This release will fix several Bugs, including but not limited to:
LDFBD-405:
A transition object, implemented in LDFBD with an unknown block at the top level causes an exception.
LDFBD-390 and related other Bugs:
Parallels containing Boxes may have distorted lines.

SVN

February 25, 2026

Latest version: 4.6.3.0

This version contains bug fixes

Development System V3

February 18, 2026

Latest version: 3.5.21.50

This version contains mainly bug fixes and some improvements in various product areas.

Control SL Deploy Tool

February 12, 2026

Latest version: 4.19.0.0

Update to runtime SDK V3.5 SP21 Patch 4

Installer

December 16, 2025

Latest version: 2.6.0.0

This version will include several bug fixes.
Additionally with this version it should be possible to select local packages during the installation process.

Recipes

November 13, 2025

Latest version: 4.7.0.0

This version contains performance improvements and bug fixes.

Mass Licenser

November 10, 2025

Latest version: 1.2.0.0

  • added out-of-license message with configurable threshold
  • added possibility to execute configurable batch file, once license threshold is reached
  • added license restore support
  • support of license name instead of only product codes

Base Libraries

October 24, 2025

Latest version: 4.0.1.0

This version prepares the transition to version 5.0: It provides unbound-placeholder resolution for the Memory Block Manager library of CODESYS. This allows for add-ons and for projects that can safely switch between Base Libraries 4.0.1 and 5.x.

Code Generator LoongArch64

October 09, 2025

Latest version: 1.0.2.0

Fixes issues with exception handling in IEC code. This is required to resolve issues with using OPC UA and BACnet on devices with LoongArch CPUs.

Scripting

October 08, 2025

Latest version: 4.2.0.0

This version contains bug fixes and some small additions to existing scripting drivers.

File-Based Storage

September 29, 2025

Latest version: 0.9.1.0

This version contains several Bug-Fixes.

Application Composer

September 15, 2025

Latest version: 4.4.0.0

This version introduces the new, application-based subscription licenses that can be updated via the Store. It also includes maintenance of Persistance Manager (15), DataLog Manager (5) and others (11).

Trace

September 15, 2025

Latest version: 4.3.0.0

Maintenance release with bug fixes.

CFC

September 09, 2025

Latest version: 4.5.0.0

This version contains several bug fixes including

Refactoring:

  • Dialog shows wrong places of changes in page-oriented CFC
  • Renaming an FB instance leads to rename of box type

Project Update:

  • When updating a project from SP16P9 (CFC 4.2.0.0) to newer versions like SP19P4 or SP20P2 (CFC 4.3.0.0 / 4.4.0.0), the alignment of boxes (inputs/outputs) and connecting links changes unexpectedly due to the introduction of the "Hide namespaces" feature

String Libraries

July 23, 2025

Latest version: 4.1.0.0

This version optimizes the treatment of 7bit-ASCII-only strings and simplifies the exchange with classic string functions by an internal terminal null.

Code Generator PowerPC

July 14, 2025

Latest version: 4.0.2.0

Contains a fix for issues with the TEST_AND_SET operator not working reliably.

Code Generator Cortex M3

July 14, 2025

Latest version: 4.0.2.0

Issues with jumps in very large POUs on ARM Cortex targets are fixed.

Security Agent

June 25, 2025

Latest version: 1.4.0.0

This release includes usability improvements.

Static Analysis

June 18, 2025

Latest version: 5.1.0.0

Analysis results can be exported in the SARIF format which allows to view and process it in third party tools and CI workflows.

Ladder

May 23, 2025

Latest version: 1.2.0.0

Adjustment of the execution order within a network. 
In this version, the execution order within a network is the same as in LD FBD.

Simulation Interface

May 22, 2025

Latest version: 0.9.0.0

Preview version of the Simulation Interface for evaluation and integration in simulation tools (please contact sales): The Simulation Interface integrates CODESYS applications into machine simulations (Software-in-the-loop) by a toggle switch using OPC UA mechanisms.

Git

January 15, 2025

Latest version: 1.7.0.0

Maintenance release containing bug fixes and usability improvements.

Library Documentation Support

November 25, 2024

Latest version: 4.6.0.0

This version contains bug fixes and minor improvements.

UML

July 23, 2024

Latest version: 4.4.0.0

Last maintenance release before start of the service phase.

Test Manager

October 05, 2023

Latest version: 5.1.0.0

Created the possibility for device manufacturers which use their own licensing mechanisms for the engineering environment to integrate the CODESYS Professional Developer Edition into their systems.

SFC

December 19, 2023

Latest version: 4.3.0.0

This version contains bug fixes and improvements.

Package Designer

June 19, 2024

Latest version: 4.2.0.0

This version contains several bug fixes and minor improvements.

Memory Tools

April 25, 2024

Latest version: 4.1.0.0

The usage of the memory tools is supported for core dumps.

Core Dump

April 29, 2024

Latest version: 4.2.0.0

This version contains bug fixes and minor improvements.

Library Dependency Inspection

September 26, 2024

Latest version: 1.1.0.0

This release fixes the problem that projects may get modified on opening, when they use libraries from Inspection-supporting library addons (currently CODESYS Base Libraries, CODESYS String Libraries).

Code Generator TriCore

February 24, 2023

Latest version: 4.0.1.0

This is a maintenance release fixing known issues for the usage of packed data structures. Furthermore, the usage of the FPU can be disabled explicitly for devices.

Code Generator ARM64

May 23, 2023

Latest version: 4.0.1.0

Improved support for Clang / LLVM EABI

Code Generator ARM

May 24, 2023

Latest version: 4.0.3.0

Improved support for Clang / LLVM EABI.

RISC Front End

January 30, 2024

Latest version: 4.0.2.0

Fixed issues in certain cases when using pack_mode attribute on ARM based devices.

Profiler

October 09, 2023

Latest version: 2.2.0.0

Application Composer Single License

October 05, 2023

Latest version: 4.3.1.0

Update of "CODESYS Application Composer Single License" only, no functional changes. This update is necessary for running "CODESYS Application Composer" (any version) in SL-mode on any new CODESYS versions starting with V3.5 SP19 Patch 3. It cannot be used with older CODESYS versions. For using "CODESYS Application Composer" with older CODESYS versions, use the old "CODESYS Application Composer Single License".