CODESYS^® Releases & Updates

This version introduces complete UI-less Python scripting. Also it fixes a problem with very long module descriptions (>32k) and adds forward compatibility with upcoming CAA-free BASLIB 5.0 (and also still with CAA-based BASLIB 4.0.1).

Maintenance release

Enables an LLM to interact with the CODESYS Development System through the Model Context Protocol interface. To achieve this, an MCP server is integrated into the Development System. The server provides a set of so-called tools that allow an LLM to:

• Read project contents
• Create or modify datatypes and POUs using structured text
• Use the compiler and retrieve compiler errors
• Access library documentation

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

Allow UTF-8 identifiers for the trace name and traced variables in the Trace Editor.

This new library add-on contains a library with elements (PID, filters, …) for programming control loops: the library ControlLoop (which used to be available in the store as "Control Loop Library").

This version contains bug fixes.

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.

This version contains bug fixes

Redundancy bugfixes and improvements

This version contains performance improvements and bug fixes.

• 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

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.

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.

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

This version contains several Bug-Fixes.

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

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

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

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

This release includes usability improvements.

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

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.

Maintenance release containing bug fixes and usability improvements.

This version contains bug fixes and minor improvements.

Last maintenance release before start of the service phase.

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.

This version contains bug fixes and improvements.

This version contains several bug fixes and minor improvements.

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

This version contains bug fixes and minor improvements.

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).

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.

Improved support for Clang / LLVM EABI

Improved support for Clang / LLVM EABI.

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

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".