
CODESYS Release & Teaser Notes
Trace
14. April 2026
Aktuellste Version: 4.4.0.0
Allow UTF-8 identifiers for the trace name and traced variables in the Trace Editor.
ControlElement Libraries
13. April 2026
Aktuellste Version: 4.0.0.0
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").
EtherCAT
07. April 2026
Aktuellste Version: 4.11.0.0
This version contains bug fixes.
HMI SL
02. April 2026
Aktuellste Version: 3.5.22.10
This version fixes a display issue in SP22 where the title bar incorrectly displayed a warning that this is a test version.
In addition, the runtime SDK includes fixes for a small number of critical bugs in the following areas:
- Network license management
- Redundancy
OPC DA Server SL
02. April 2026
Aktuellste Version: 3.5.22.10
This version fixes a display issue in SP22 where the title bar incorrectly displayed a warning that this is a test version.
In addition, the runtime SDK includes fixes for a small number of critical bugs in the following areas:
- Network license management
- Redundancy
Control RTE SL
02. April 2026
Aktuellste Version: 3.5.22.10
This version fixes a display issue in SP22 where the title bar incorrectly displayed a warning that this is a test version.
In addition, the runtime SDK includes fixes for a small number of critical bugs in the following areas:
- Network license management
- Redundancy
Control Win SL
02. April 2026
Aktuellste Version: 3.5.22.10
This version fixes a display issue in SP22 where the title bar incorrectly displayed a warning that this is a test version.
In addition, the runtime SDK includes fixes for a small number of critical bugs in the following areas:
- Network license management
- Redundancy
Development System V3
02. April 2026
Aktuellste Version: 3.5.22.10
This version fixes a display issue in SP22 where the title bar incorrectly displayed a warning that this is a test version.
In addition, the runtime SDK includes fixes for a small number of critical bugs in the following areas:
- Network license management
- Redundancy
Periphals for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
CodeMeter for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
LicenseServer for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
TargetVisu for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Virtual Safe Control SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Virtual Control for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Edge Gateway for Linux
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for WAGO Touch Panels 600 SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for Raspberry Pi SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for PLCnext SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for PFC200 SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for PFC100 SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for Linux SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for Linux ARM SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for IOT2000 SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for emPC-A/iMX6 SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Control for BeagleBone SL
01. April 2026
Aktuellste Version: 4.20.0.0
Redundancy bugfixes and improvements
Redundancy
26. März 2026
Aktuellste Version: 4.3.0.0
Maintenance and usability version
Modbus
26. März 2026
Aktuellste Version: 4.5.1.0
Single bugfix in context of CODESYS redundancy.
Installer
11. März 2026
Aktuellste Version: 2.6.1.0
This version contains bug fixes.
LD FBD
03. März 2026
Aktuellste 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
25. Februar 2026
Aktuellste Version: 4.6.3.0
This version contains bug fixes
Control SL Deploy Tool
12. Februar 2026
Aktuellste Version: 4.19.0.0
Update to runtime SDK V3.5 SP21 Patch 4
Control SL Extension Package
12. Februar 2026
Aktuellste Version: 4.19.0.0
Update to runtime SDK V3.5 SP21 Patch 4
NetX
29. Januar 2026
Aktuellste Version: 4.1.0.0
This version contains bug fixes.
PROFINET
21. Januar 2026
Aktuellste Version: 4.7.2.0
This version corrects one internal error that prevents the version 4.7.0.0 and 4.7.1.0 to be used with CODESYS V3.5 SP22.
SoftMotion
20. Januar 2026
Aktuellste Version: 4.20.2.0
This version patches a critical bug.
Safe Control Core
20. Januar 2026
Aktuellste Version: 4.2.0.0
This update introduces FSoE Master support, improved diagnostics, and time provider redundancy functions.
OPC UA Client API
19. Januar 2026
Aktuellste Version: 1.3.0.0
This version adds support for Timestamps on values from the server.
Visualization
18. Dezember 2025
Aktuellste Version: 4.9.1.0
Maintenance release containing bug fixes.
IIoT Libraries SL
16. Dezember 2025
Aktuellste Version: 1.13.0.0
This version
- adds support for binary HTTPS (application/octet-stream) and for HTTPS and Mail with OAuth2 Grant_Type = Device_code
- provides an example for using Azure Event Grid with the MQTT Client library
- provides maintenance of Azure IoT Hub, MQTT Client, Web Client, Mail Service
- supports library inspection and license manager
- is forward compatible with upcoming CAA-free BASLIB 5.0 (and also still with CAA-based BASLIB 4.0.1)
Visualization Support
16. Dezember 2025
Aktuellste Version: 4.7.0.0
Maintenance release containing bug fixes.
DNP3 SL
02. Dezember 2025
Aktuellste Version: 2.0.0.0
Support for additional data types and events is added to complete support of DNP3 Level 1 for the outstation library.
Additionally support for implementing a DNP3 master will be added.
Automation Server
26. November 2025
Aktuellste Version: 1.38.0.0
With this version, the Automation Server has its own file system in the cloud to store any files. In addition to pure file storage, this also enables additional files to be remotely deployed to PLCs along with the actual CODESYS application.
Safety Support
17. November 2025
Aktuellste Version: 4.1.0.0
New version enhances the SubNodeCom library to provide more detailed and precise diagnostic information.
Recipes
13. November 2025
Aktuellste Version: 4.7.0.0
This version contains performance improvements and bug fixes.
Mass Licenser
10. November 2025
Aktuellste 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
Communication
28. Oktober 2025
Aktuellste Version: 4.7.0.0
Support for exporting the OPC UA server contents as nodeset xml files for offline engineering of OPC UA clients.
OPC UA PubSub SL
28. Oktober 2025
Aktuellste Version: 1.3.0.0
This version introduces message security for Pub/Sub for runtimes V3.5 SP21 or later (with runtimes < V3.5 SP22, it must use the same certificate using in other OPC UA functions). Additionally, the OPC UA Pub/Sub license is included in the "software metrics" dialog.
Base Libraries
24. Oktober 2025
Aktuellste 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.
EDS Import
14. Oktober 2025
Aktuellste Version: 4.3.0.0
This version contains bug fixes.
Code Generator LoongArch64
09. Oktober 2025
Aktuellste 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
08. Oktober 2025
Aktuellste Version: 4.2.0.0
This version contains bug fixes and some small additions to existing scripting drivers.
File-Based Storage
10. September 2025
Aktuellste Version: 0.9.1.0
This version contains several Bug-Fixes.
Soft Motion Stäubli Support
18. September 2025
Aktuellste Version: 1.0.0.0
CODESYS SoftMotion Staubli allows to control Staubli robots of the TS2 and TX2 series with CODESYS using the uniVAL drive interface.
CODESYS EtherCAT version 4.10.0.0 contains a known issue with the function "Load PDO info from the device", which prevents it from working properly with the CODESYS SoftMotion Staubli Support package. Please use either an earlier or a newer version of CODESYS EtherCAT instead.
Application Composer
15. September 2025
Aktuellste 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).
CFC
09. September 2025
Aktuellste 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
Safety SIL2
24. Juli 2025
Aktuellste Version: 3.5.21.0
The release of our SIL2 certified runtime based on runtime system SDK V3.5 SP21. This version includes the PLCOpen Safety V2.0 function blocks for factory automation.
String Libraries
23. Juli 2025
Aktuellste 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
14. Juli 2025
Aktuellste Version: 4.0.2.0
Contains a fix for issues with the TEST_AND_SET operator not working reliably.
Code Generator Cortex M3
14. Juli 2025
Aktuellste Version: 4.0.2.0
Issues with jumps in very large POUs on ARM Cortex targets are fixed.
Security Agent
25. Juni 2025
Aktuellste Version: 1.4.0.0
This release includes usability improvements.
Static Analysis
18. Juni 2025
Aktuellste 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.
Safety Extension
17. Juni 2025
Aktuellste Version: 4.4.0.0
Bug fix version for a more robust online communication with CODESYS Safety Extension.
Ladder
23. Mai 2025
Aktuellste 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
22. Mai 2025
Aktuellste 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.
PROFIBUS
05. Mai 2025
Aktuellste Version: 4.2.0.0
This version contains bug fixes.
Automation Server Connector
10. April 2025
Aktuellste Version: 1.36.0.0
Edge Gateway for Windows
18. März 2025
Aktuellste Version: 3.5.21.0
Service packs for CODESYS V3 are released at annual intervals and include numerous improvements and bug fixes.
Control RTE SL (for Beckhoff CX)
18. März 2025
Aktuellste Version: Version 3.5.21.0
Service packs for CODESYS V3 are released at annual intervals and include numerous improvements and bug fixes.
CANopen Manager SL
27. Januar 2025
Aktuellste Version: 4.3.0.0
This version was triggered by a major bug (CANOPEN-254) and will include some other bug fixes and improvements.
CANopen Device SL
27. Januar 2025
Aktuellste Version: 4.3.0.0
This version was triggered by a major bug (CANOPEN-254) and will include some other bug fixes and improvements.
Git
15. Januar 2025
Aktuellste Version: 1.7.0.0
Maintenance release containing bug fixes and usability improvements.
Library Documentation Support
25. November 2024
Aktuellste Version: 4.6.0.0
This version contains bug fixes and minor improvements.
EtherNet/IP
23. Juli 2025
Aktuellste Version: 4.8.0.0
Besides bug fixes and improvents, this version will bring a network overview page with all connections of all adapters.
UML
23. Juli 2024
Aktuellste Version: 4.4.0.0
Last maintenance release before start of the service phase.
Test Manager
05. Oktober 2023
Aktuellste 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
19. Dezember 2023
Aktuellste Version: 4.3.0.0
This version contains bug fixes and improvements.
Safety for EtherCAT Safety Module SL
29. August 2024
Aktuellste Version: 4.4.0.0
This version contains bug fixes and minor improvements.
POU Visu Generator
25. Juni 2024
Aktuellste Version: 1.0.0.0
The POU Visu Generator can generate visualizations from SFC and Ladder POUs. If a transition of a SFC POU is implemented as Ladder, a navigation into the Ladder transition and back to the SFC POU is generated. A great possibility to view SFC and Ladder diagrams within the visualization.
Package Designer
19. Juni 2024
Aktuellste Version: 4.2.0.0
This version contains several bug fixes and minor improvements.
Memory Tools
25. April 2024
Aktuellste Version: 4.1.0.0
The usage of the memory tools is supported for core dumps.
EtherNet Adapter
28. März 2023
Aktuellste Version: 4.2.0.0
This version adds language support for Turkish and Portuguese and contains a bugfix.
Core Dump
29. April 2024
Aktuellste Version: 4.2.0.0
This version contains bug fixes and minor improvements.
Library Dependency Inspection
26. September 2024
Aktuellste 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
24. Februar 2023
Aktuellste 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
23. Mai 2023
Aktuellste Version: 4.0.1.0
Improved support for Clang / LLVM EABI
Code Generator ARM
24. Mai 2023
Aktuellste Version: 4.0.3.0
Improved support for Clang / LLVM EABI.
IO-Link SL
23. April 2024
Aktuellste Version: 4.3.0.0
By serving as a gateway, this version enables proprietary add-ons to connect to IO-Link devices.
RISC Front End
30. Januar 2024
Aktuellste Version: 4.0.2.0
Fixed issues in certain cases when using pack_mode attribute on ARM based devices.
BACnet SL
06. Dezember 2023
Aktuellste Version: 2.0.0.0
Support new functionality standardized in BACnet standard ASHRAE 135-2020 and protocol revision 25.
Profiler
09. Oktober 2023
Aktuellste Version: 2.2.0.0
Application Composer Single License
05. Oktober 2023
Aktuellste 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".
Safety
14. September 2020
Aktuellste Version: 4.1.6.1
Safety certificate update to cover the new versions of the safety norms IEC 62061:2021 and ISO 13849:2023