Codesys Ros2 -

Because ROS2 uses DDS for communication, the most seamless architectural approach is bringing DDS directly to the PLC. Micro-ROS allows resource-constrained microcontrollers and real-time operating systems to run optimized ROS2 nodes natively. Alternatively, third-party libraries allow CODESYS to communicate via raw UDP packets structured to match DDS topics.

: High-speed communication is often achieved via shared memory. A ROS 2 node reads and writes data to a specific memory location that the CODESYS runtime can also access, enabling extremely low-latency data exchange. ROBIN Project

For a standard configuration, developers often use OPC UA or Modbus TCP. Since CODESYS includes built-in OPC UA servers, a ROS 2 node running an OPC UA client wrapper can read and write PLC tags.

(Robot Operating System 2) bridges the gap between high-level robotic intelligence and low-level industrial control. This combination allows you to use ROS 2 for path planning or AI, while CODESYS handles real-time safety, motor control, and factory-floor protocols like EtherCAT or PROFINET. 🛠️ Methods to Connect CODESYS and ROS 2 codesys ros2

We can expect to see more commercial off‑the‑shelf bridges, improved real‑time support in ROS 2’s DDS middleware (e.g., zero‑copy shared memory transports), and possibly a native CODESYS‑ROS2 communication library directly from CODESYS Group.

For high-performance applications (200Hz to 1000Hz), shared memory is the best option if both systems run on the same hardware (like a Raspberry Pi or an IPC). Architecture A ROS 2 node writes data to a shared memory segment.

This is the preferred approach for high-frequency control loops. A specialized ROS node reads/writes data directly into a shared memory segment, which the CODESYS runtime also accesses. This minimizes latency. B. OPC UA (Standardized Industrial Connectivity) Because ROS2 uses DDS for communication, the most

For less time-critical tasks, CODESYS can connect to a rosbridge_suite websocket, allowing the PLC to interact with ROS topics and services via JSON messaging. 3. Step-by-Step: Setting Up a CODESYS to ROS 2 Bridge

The combination of CODESYS and ROS2 is expanding across several key industrial sectors:

CODESYS and ROS 2 Integration: Bridging Industrial Automation and Advanced Robotics : High-speed communication is often achieved via shared

The worlds of industrial automation and advanced autonomous robotics have historically operated on completely different planes. Industrial automation relies heavily on Programmable Logic Controllers (PLCs) running deterministically via the IEC 61131-3 standard. Meanwhile, cutting-edge service robotics, autonomous mobile robots (AMRs), and artificial intelligence systems are built primarily within the Robot Operating System 2 (ROS 2) ecosystem.

Step-by-Step Implementation Guide: Building an OPC UA Bridge

Rather than writing custom ROS 2 drivers for every fieldbus protocol—CANopen, EtherCAT, Modbus, Ethernet/IP, and others—developers can let CODESYS handle the hardware layer and expose a clean, high‑level interface to ROS 2. This separation of concerns reduces complexity, speeds up development, and improves reliability. In a typical scenario, CODESYS manages all low‑level I/O and fieldbus communication, while ROS 2 focuses on higher‑level motion planning, perception, and overall system coordination.

CODESYS and ROS 2: The Future of Industrial Automation and Mobile Robotics

At the heart of CODESYS's motion capabilities is , a software library that extends the standard CODESYS runtime with powerful motion control functionality. It provides function blocks for managing single axes and coordinated multi-axis movements, electronic cams and gears, and CNC path interpolation. When integrated with ROS 2, a typical pattern is for an ROS 2 node to send high-level motion commands, such as a target pose for a pick-and-place operation. A CODESYS program then uses SoftMotion's multi-axis interpolation function blocks to compute the necessary joint trajectories and execute the motion with precise timing. This allows ROS 2 to focus on perception and planning while CODESYS handles real-time motion execution.