CANopen is a communication protocol used in embedded systems, particularly in industrial automation. It operates over the Controller Area Network (CAN) bus, allowing devices like sensors and actuators to communicate efficiently. This protocol is designed to facilitate the integration of various devices from different manufacturers, ensuring interoperability in complex systems. The CANopen protocol defines a set of rules for data exchange, including how devices are identified and how messages are prioritized. It supports features like network management, device configuration, and real-time data transfer, making it suitable for applications in robotics, manufacturing, and transportation.