Various metainformation is exchanged via a control byte (multiplexor). For example, this information may include: Number of data bytes to be transmitted, the packet count, the type of transmission (global or connection-oriented). The following table lists the various meanings.

J1939 Transport Protocol Commands:

RTS: Request To Send
Announcement of the Connection Mode Data Transfer protocol
CTS: Clear To Send
Answer (positively acknowledging) to an RTS command, requests a receiver-specific number of individual packets (flow control)
EomACK: End Of Message Acknowledge
Acknowledgment of the complete receipt of a multi-packet message
Abort: Termination of the Connection Mode Data Transfer protocol
BAM: Broadcast Announce Message
Announcement of the BAM protocol

Last modified: Thursday, 12 April 2018, 9:59 AM