The Frame

A frame has a size of up to  64 bytes and is divided into the following areas:

 

• At the beginning of a frame the start field signals the start of a frame.
• It is separated from the data field by a boundary field.
• The data field contains the actual user data and can be up to 60 bytes (this corresponds to 7.5 times the CAN bus).
• Two control bytes contain the address of the transmitter and the receiver, as well as simple control commands (e.g. "fast forward" or "playback").
• The status field contains additional information on transmitting the frame for the receiver.
• The parity field takes a checksum and therefore enables the identification of incomplete or defective frames.