CODESYS® Releases & Updates

CODESYS Release & Teaser Notes

OPC UA Client API

August 24, 2026

Latest version: 1.4.0.0

This version improves the handling of problems with subscriptions on the server side: access to subscription status codes; error code for rejected subscription.

DNP3

August 04, 2026

Latest version: 2.0.1.0

Fixed hard coded limit for communication channels

EtherCAT

July 30, 2026

Latest version: 4.12.0.0

This version contains bug fixes, improvements and the following new features:

  • support for Beckhoff MX-System
  • support for Balluff IO-Link gateways BNI XG1, XG3 and XG5
  • improvements, when used together with CODESYS Redundancy

PROFINET

July 29, 2026

Latest version: 4.8.0.0

This version will contain bug fixes, improvements and the following new features:

  • Topology Editor that displays graphically all involved devices and its connections.
  • Dynamic Reconfiguration to support online change when modifying/adding devices.
  • Support of GSDML specification V2.46
  • Show newest installed device only
    • Per default, no more duplicates / older versions of a device are shown.
  • SysEthernetBurst
    • Use new runtime interface (included in SP22) that sends and receives multiple Ethernet frames with one call.
    • Noticeable performance improvement.

OPC DA Server SL

July 23, 2026

Latest version: 3.5.22.30

This version contains bug fixes in various product areas.

EtherNet/IP

June 25, 2026

Latest version: 4.9.1.0

Maintenance version.

CANopen Manager SL

June 23, 2026

Latest version: 4.4.0.0

Maintenance version.

CANopen Device SL

June 23, 2026

Latest version: 4.4.0.0

Maintenance version.

IO-Link SL

June 02, 2026

Latest version: 4.4.0.0

Maintenance version.
It will support the IO Device Description Scheme 1.1.5.

Communication

May 18, 2026

Latest version: 4.8.0.0

The data source online change can be licensed and activated using the new store product "Online Configuration Change"

Modbus

May 12, 2026

Latest version: 4.6.0.0

This version will contain bug fixes.

  • Optional additional I/O channels that contain diagnosis information of each single Modbus channel.
  • New FB ModbusTCPRequestServer that allows the application to control the server's answers to requests from the client.

NetX

January 29, 2026

Latest version: 4.1.0.0

This version contains bug fixes.

IIoT Libraries SL

December 16, 2025

Latest 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)

OPC UA PubSub SL

October 28, 2025

Latest 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.

EDS Import

October 14, 2025

Latest version: 4.3.0.0

This version contains bug fixes.

PROFIBUS

May 05, 2025

Latest version: 4.2.0.0

This version contains bug fixes.

EtherNet Adapter

March 28, 2023

Latest version: 4.2.0.0

This version adds language support for Turkish and Portuguese and contains a bugfix.

BACnet SL

December 06, 2023

Latest version: 2.0.0.0

Support new functionality standardized in BACnet standard ASHRAE 135-2020 and protocol revision 25.