Murphy Xpansion IX3212, Reference Manual

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Section 80 00-02-0829
2018-02-26 - 18 -
4.2 Naming and Numbering Conventions
The byte/bit order is represented in the following figure. Bit 1 is the least significant bit (lsb)
and Bit 8 is the most significant bit (msb). Byte 1 is the transmitted first and Byte 8 is last (i.e.
sequential).
The structures are defined for each type of configuration, control, feedback and diagnostic
message.
The following example message structure closely follows the SAE J1939 PGN convention.
The message must contain 8 bytes.
Example Message
Data Length 8 bytes
Start Position Length Parameter Name Reference
1 1 byte Feedback and Diagnostics Identifier 4.5.1.1
2.7 2 bits Digital Input 4 4.5.1.2
2.5 2 bits Digital Input 3 4.5.1.2
2.3 2 bits Digital Input 2 4.5.1.2
2.1 2 bits Digital Input 1 4.5.1.2
3.7 2 bits Digital Input 8 4.5.1.2
3.5 2 bits Digital Input 7 4.5.1.2
3.3 2 bits Digital Input 6 4.5.1.2
3.1 2 bits Digital Input 5 4.5.1.2
4.7 2 bits Digital Input 12 4.5.1.2
4.5 2 bits Digital Input 11 4.5.1.2
4.3 2 bits Digital Input 10 4.5.1.2
4.1 2 bits Digital Input 9 4.5.1.2
5 2 bytes Analog Input 1 4.5.1.3
7 2 bytes Analog Input 2 4.5.1.3