Release Runtime Infos

Track key runtime upgrades across protocols, performance, and stability. Each release brings sharper diagnostics, faster communication handling, updated libraries, and more reliable Online Change—giving developers a clearer, more robust execution environment.

Explore the full release notes and start optimizing your runtime today.

Version 25.0

14.01.2025

Added Features:

Protocols & Communication
- Modbus TCP client OC: Improvements to Online Change (RT) by removing OC restrictions and initializing/configuring Modbus Busmaster during parsing.
- PROFINET IO Controller: Preparation for CC-A Compliance.
- Net IO TLS Extensions Support: Now supports Server Name Indication (SNI).
- Explicit Modbus Optimization: Optimized feature to reduce the number of Mutexes used in the Modbus implementation.
- EIP_EXPLICIT Fix: Resolved multi-threading issues that previously led to system crashes.
Maintenance: Updated all third-party libraries(Mangoose,Openssl…) to their current versions.
OPC UA Enhancements
- Capacity: Support for 40K OPC-UA Tags in both HA (High Availability) and non-HA configurations.
- Performance: OPCUA Sampling time has been adjusted to 10ms.
- OPCUA_connect (Common Handling): Implementation of a common way to handle connection management for TCP client SFBs.
- OPCUA_connect (Extended Diagnostics): Added new output parameters for textual error status:
  - NetworkState: Textual information for network error codes.
  - ProtocolState: Textual information for protocol error codes.

LLVM Backend & System Architecture (Not Released yet, but work done)
- 64-bit Readiness:
  - Provide an arm64 EcoRT support.
  - Adapted the RT Unittest framework for compatibility with 64-bit or LLVM FBTypeCompiler in TestNetworks.
- LLVM Optimizations
  - LLVM Multi-Value Parameters optimization.
  - LLVM IR (Intermediate Representation) standard optimization.
  - Local Variables of Algorithm handling.
  - Improved Error Handling within the backend.

Bugs Fixes & Enhancements:

HW CAT display inconsistency of Modbus cycle time
Modbus RTU HW CAT bugs fix
Memory leaks in Modbus
ALARM_BIT Unexpected Behaviour
MODBUS library – OC issue with Symlinks
Fixed: When MB_EXPLICIT_READ fb is cyclically triggered by E_CYCLE with 500ms duration, then softplc crashes.
MB_READ_REGISTERS: When the Rollback operation performed RT was crashing
Codebase traceability: store nuget package version and build information

Version 24.1

15.07.2025

Added features

Added Function Blocks to support Modbus explicit reads and writes
Update third-party libraries to new version (OPEN SSL, MBED TLS)
Update OPC UA Stack to 1.8.x + bug fix patches
Technical debt reduction – code refactoring to improve the runtime reliability and stability.
SDL improvements
WebSocket server improvements
MQTT connection management enhancements
ProfiNet improvements – Acyclic Messages and Alarm data exchange.
Modbus Server Security improvement – support of FC 43 and sub-code 14.
OPC UA server and client responsiveness improvement

Fixed issues

[EIP_EXPLICIT] Status of EIP_Explicit function block is showing not initialized when used inside HW CAT
MQTT – MQTT_PUBLISH logs not optimized (spamming, not verbose & user-friendly)
PCR- ModbusSlave – Autocalculation doesn’t work when there is a mix of ModbusRReg and ModbusWReg
Segmentation fault when running Application hosting EIP + ProfiNet
PCR – NETIO block in TCPS or a behavior issue, depending on the certificates. TCP ok but TCP + TLS no work
MQTT – Segmentation Fault on alpine OS
MODBUS library – OC issue with Symlinks
MB Explicit Read query to unavailable server causes cyclic queries to be sent over different client port
MB_WRITE_REGISTERS write array data wrongly when SWAP_BYTES is enabled in MB_CONNECT

Version 24.0

14.10.2024

Features:

Profinet stack bindings: Integration or updates for Profinet communication layers.
Cross-device communication: Now supports SRT (Secure Reliable Transport) for data exchange between devices.
MQTT Stability: Includes bug fixes for the MQTT protocol implementation.
FB (Function Block) Watch: Monitoring is now possible even when the system is in a stopped state.
Windows Compatibility: Added support for building the project using Visual Studio 2022 on Windows.
Architecture Readiness: The runtime has been optimized and prepared for 64-bit support.

Version 23.1

27.06.2024

The following “Changes” include new features and specific fixes:

Fixes

Default configuration files copied to proper EcoRT directory
Improved processing of CHMIMachine commands during Online Change
Allow adding CrossComm during an Online Change
Fixed device stuck in READY state after Online Change swap timeout
Fixed multiple Modbus Client issues (VTQ update, stability)
Fixed OPCUA Connect FB issue that was always reporting reconnecting
Fixed reliable cross-comm when using multiple adapters with VTQ variables
Fixed failing write operation for Modbus server
Fixed VTQ value when Modbus Server is not connected
OPCUA improvements to deal with exhausted memory
Improved OC swap to reduce timeout occurrences
Fixed issue preventing writing Modbus server register

New Features

OpenSSL 3 support
OPC UA stack version 1.7.1
High Availability (HA)
MQTT function blocks
Multiple resources per device support
MIB added for Boot Project

Version 23.0

29.09.2023

Bug Fixes and Improvements:

OPC UA & Communication
- Fixed OPC UA memory corruption after EcoRT restart.
- Fixed OPC UA_CONNECT issue leading to stuck connections.
- Updated OPC UA default settings to support 20k tags.
- Fixed WEBSOCKET_SERVER issue that could block the deploy port.
- Fixed performance issue on OPC UA server when a client disconnects.
- Fixed OPC UA compatibility issue with KEPSERVER.
Modbus & Protocols
- Fixed Modbus RTU server reporting undue errors.
- Fixed unrecognized request 0x2B on Modbus RTU Server.
- Fixed Modbus request not gathering all requested registers.
- Fixed data not properly read with Modbus RCOIL1, RCOIL2, and MB_R_BOOL.
- Corrected Modbus bit optimization logic.
Runtime & System Stability
- Improved stability of Online Change during swap.
- Fixed restart/reboot instabilities, including cases where the RT did not move to the RUN state.
- Fixed potential security issues on VxWorks, x86, and armhf.
- Substitute non-MT safe C functions in common RT code and Linux OSAL.
- Fixed memory management during OLC controller.
Compiler & Logic
- Fixed compile error reported by EAE when using max values for LREAL and VTQLREAL datatypes.
- Compiler now emits a warning when ST function ADD_TIME is called with 1 argument.
- Fixed ST REAL_TO_DINT conversion bug.
- VTQ types are now available for UDT in ST.

New features

Added support of reliable cross-communication
Added the System.CurrentUTCTime entry for the MIB Function Block
Adding PD_COPY service function block
Adding support for publishing diagnostics (CPU & MEM) using MQTT

Version 22.1

19.12.2022

This repository contains the source code of EcoRT, the UAO IEC 61499 runtime compatible with EAE Buildtime.

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