Control Area Network (Can) Message

Fig 1: Identifying Controller Area Network Message Format

GLL105869

Courtesy of VOLVO CARS OF NORTH AMERICA.

The message consists of the following components:

Identifier ("flag"), indicating the message identity and prioritization
Data information (value, information, etc.).
Check sum, used to check that the message has arrived correctly
Stop signal, indicating that the message has finished.

A complete CAN-message is called a frame.