![]() This is necessary because heavy-duty vehicles are equipped with more ECUs and process a larger volume of data than consumer vehicles. The 29-bit version is an extended message format designed to store more information than an 11-bit version. 29-bit CAN identifiers are commonly used in heavy-duty vehicles, while 11-bit CAN identifiers are commonly used in consumer vehicles. The higher the data transfer rate, the faster the data moves from one device to another.ĬAN identifiers come in different sizes. In technical terms, the TJ1939 protocol typically operates at a data rate of 250kbps or 500kbps. ![]() These codes serve as addresses that help determine the message's priority, source, and destination within the network, allowing devices on the CAN bus to understand which messages are meant for them and how important those messages are. Each PG is associated with a unique PGN, allowing ECUs to understand the content of the message based on its PGN.ĬAN identifiers are unique codes assigned to each message transmitted on a CAN bus. ![]()
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