CANopen Communication for Motors

Did you know that over 70% of industrial motor communication networks depend on fieldbus protocols? Among these, CANopen stands out as one of the most reliable and flexible solutions—especially in applications where real-time control, precision, and scalability are critical.

As industries move toward smarter, more connected automation systems, CANopen communication for motors is quickly becoming a go-to choice for engineers and system integrators.

Understanding the Foundation: CAN and CANopen

Before diving into how CANopen works in motor communication, it’s important to understand the layered approach:

• • CAN (Controller Area Network) is the physical and data link layer. It defines how devices transmit raw data over a two-wire twisted pair.
  • CANopen, on the other hand, is a higher-layer protocol built on top of CAN. It defines how devices like motor controllers, sensors, and PLCs communicate in a structured and meaningful way.

This layered architecture gives CANopen its real-time efficiency, reliability, and modularity—making it perfect for complex motion control systems.

What is CANopen Communication for Motors?

CANopen is a communication protocol widely used in automation and embedded systems. In motor control, it enables precise synchronization and coordination of multiple motors—essential for systems where timing and responsiveness are mission-critical.

It standardizes how devices exchange data and manage operations, offering plug-and-play interoperability between devices from different manufacturers.

How CANopen Works in Motor Control

CANopen is a communication protocol widely used in motor control systems for industrial automation. It operates over the CAN (Controller Area Network) bus, enabling reliable, real-time data exchange between controllers, sensors, and actuators. In motor control applications, CANopen manages device configuration, monitoring, and synchronization through standardized object dictionaries and PDO (Process Data Object) messaging, ensuring precise speed, position, and torque control. With features like error handling, network management (NMT), and flexible node addressing, CANopen enhances motor drive performance, scalability, and system integration efficiency.

Core Components of CANopen:

Each CANopen motor controller uses its own object dictionary, allowing tailored access to key motor parameters such as position, torque, and speed.

Applications of CANopen Communication for Motors

CANopen is the backbone of many precision-driven applications that require real-time coordination and dependable communication:

Advantages of CANopen in Motor Control

Real-Time Performance

Fast, deterministic communication using PDOs ensures precise motor response.

Modular and Scalable

Easily expand or reduce your system by adding/removing nodes without major reconfiguration.

Built-in Safety

Node guarding and heartbeat mechanisms help detect and isolate faults in real time.

Standardized and Interoperable

Use devices from multiple vendors with full compatibility.

Simplified Wiring

A single two-wire twisted pair for communication reduces cost and complexity.

Remote Diagnostics

Access, configure, and troubleshoot your motor systems remotely—saving time and costs.

Limitations of CANopen Communication

While CANopen is a robust and proven protocol, it’s important to consider its limitations:

Limited Bandwidth

Maxes out at 1 Mbps—less suited for high-volume data needs.

Steep Learning Curve

Understanding the object dictionary and device profiles requires technical expertise.

Not Ideal for Very Large Networks

Performance can decline with too many nodes.

Slower Than Ethernet-Based Protocols

Alternatives like EtherCAT offer higher speed and synchronization for demanding systems.

SOLO Motor Controller with CANopen

At SOLO Motor Controllers, we’ve integrated native CANopen support to provide high-performance, industrial-grade motion control. Whether you’re building a new system or upgrading existing machinery, SOLO makes integration effortless.

With SOLO + CANopen, you can:

• • Configure motor parameters via SDO with no external programming.
  • Control motor speed, torque, and position dynamically through PDOs.
  • Monitor system health using heartbeat and error messages.
  • Communicate with PLCs or PC-based systems via standardized profiles like DS402.

SOLO Motor Controller Benefits:

Conclusion

CANopen communication for motors provides a powerful and standardized way to manage motion systems with precision, reliability, and scalability. While it may not match the bandwidth of Ethernet-based protocols, its real-time efficiency, simplicity, and flexibility make it the ideal solution for robotics, EVs, CNC machines, and more.