CODESYS^® Comunicati e aggiornamenti

This release fixes issues with the stack alignment and makes it fully EABI compliant.

This version contains bug fixes in various product areas.

Error Analysis & Diagnostics

• Improved Diagnostic Accuracy with ErrorAnalyzation: Corrected error reporting for alternative branches and multiple transitions to ensure precise fault localization in complex logic.

Editor & Workflow Efficiency

• Enhanced Refactoring Capabilities: Improved refactoring functionality for steps and FB instances, including calls within FBD actions.
• Optimized Editor Usability: Improved user experience through optimized input field scaling and horizontal scrolling.

System Stability & Compliance

• Corrected State & Setting Management: Fixed issues regarding the persistence of project settings and transition state management during editor sessions.

Maintenance release
Fixes sporadic issues with the atomicity of the TESTANDSET operator.

Fixes sporadic issues with the atomicity of the TESTANDSET operator.

Highlights of this release:

• Customizable toolbox – add your own items and access frequently used blocks directly
• Improved parallel branches – insert markers on hover, clearer parallel insert commands, new Show Insert Positions toggle (Ctrl+Shift+M), plus several reliability fixes for closing branches
• EN/ENO compile fixes – MOVE and operator boxes (ADD, AND, MUL, OR, SEL, SUB, XOR) with EN but without ENO now compile as expected (relevant after LDFBD → LD2 conversion)
• Editor fixes – Unicode/CJK variable names no longer truncated; negated contacts colored correctly in online view; accurate error locations on NC contacts and transitions; connected inputs and outputs preserved on FB type change
• Stability – crash on block type change, Project Compare Allow Single exception, and cross-reference list freeze all resolved
• Hardened PLCopenXML import/export – FBs without EN/ENO pins, edge-detection modifiers, schema ordering issues
• File-Based Storage support for LD2 POUs (requires SP22 + File-Based Storage 1.0.0.0)

Update to runtime SDK V3.5 SP22 Patch 3 - ‎Increased robustness and bugfixes for Control SL Deploy Tool

Enable usage of codegenerators for ARM architecture in CODESYS 4

This version can only be installed if no older versions (before November 2025) of several add-ons are installed:

• No old setup add-ons: CODESYS Communication, Visualization, Ethernet IP, Application Composer.
• No old optional add-ons: CODESYS ControlElement Library, IIoT Libraries, OPC UA Client API.
• No CODESYS OPC UA Pub/Sub before 1.4.0.0 (release not yet scheduled).

Reason: It cuts dependencies on CAA libraries. This introduces an incompatibility where user-defined data types are used in Element Collections (they now need to implement MBM.IDisposable).

Additionally it includes fixes for multi casting (Net Base Services) and online change (Element Collections),
and provides an updated library project template.

Highlights of this release:

• New file format – cleaner structure, easier to diff
• Normalized line endings for reliable Git operations across platforms
• UX refinements aligned with CODESYS SP22
• Compatible with CODESYS Git V2.0.0.0
• Improved Scripting driver
• Read-Only Mode – usable without a license

Designed for file-based project workflows in CODESYS Development System.

Add the possibility for SDK customers to add custom tools to the MCP Server.

This version includes bug fixes.
The inlcuded third-party components will be updated to the latest available versions.

With this version we will improve the usability for 
certificate signing request (CSR) and
certificate revocation lists (CRL)

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

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").

Maintenance and usability version

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

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

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 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.

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.

Rilascio di manutenzione contenente correzioni di bug e miglioramenti dell'usabilità.

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 several bug fixes and minor improvements.

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

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).

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".