What is ISO 11898-2:2021?

ISO 11898-2:2021, the international standard for Controller Area Network (CAN) data link layer and physical signaling, plays a crucial role in various industries, including automotive, aerospace, and industrial automation. In this article, we will explore the key aspects of ISO 11898-2:2021 and its significance in ensuring reliable communication in CAN networks.

of ISO 11898-2:2021

ISO 11898-2:2021 specifies the high-speed medium access unit (HAM) and physical signaling, also known as CAN FD (Flexible Data-Rate), which extends the maximum transmission rate compared to the classic CAN protocol. The standard defines the electrical characteristics, media-dependent interface, transmission medium, and frame format for CAN FD.

With CAN FD, the data rate can be increased up to 5 Mbit/s for short-distance communication, while still supporting backward compatibility with the classic CAN protocol at lower speeds. This flexibility enables the effective utilization of CAN networks in modern applications that demand higher bandwidth and enhanced communication efficiency.

Advantages of ISO 11898-2:2021

The adoption of ISO 11898-2:2021 brings several benefits to CAN-based networks:

Higher Data Transmission Rates: The increased data rates offered by CAN FD facilitate faster and more efficient communication, enabling the seamless transfer of large volumes of data within strict time constraints.

Improved Network Scalability: With higher data rates, CAN FD allows for larger network topologies with more nodes, expanding the possibilities for complex system architectures in industries such as automotive and industrial automation.

Enhanced Error Detection and Fault Confinement: ISO 11898-2:2021 introduces improved mechanisms for error detection, reporting, and fault confinement, enhancing the overall reliability and robustness of the CAN network.

Implementation and Compliance

To ensure compatibility with ISO 11898-2:2021, manufacturers need to design their CAN controllers, transceivers, and other related devices according to the specified electrical characteristics. Compliance testing is essential to verify adherence to the standard's requirements.

Additionally, firmware and software development must incorporate the necessary protocols and features to support CAN FD. The implementation process should consider factors such as baud rate calculation, frame format handling, and error handling mechanisms as per the standard.

In conclusion, ISO 11898-2:2021 plays a vital role in enabling reliable and efficient communication in CAN networks, allowing for higher data rates and improved scalability. Its adoption provides various advantages across multiple industries, emphasizing the importance of complying with the standard's specifications for successful implementation.