J1939 Interface 6-11
© 2012 HMS Industrial Networks AB
Doc.Id. HMSI-168-25
SPN Conversion Method 1 - Encoding version 1 - The least significant bits with
the FMI and the upper 16 bits in Big Endian order.
SPN Conversion Method 1 - Encoding version 2 - The least significant bits with
the FMI and the upper 16 bits in Little Endian order.
Word
Byte
Bits
Description
0
0
0-2
J1939 SPN bits 0-2
3-7
J1939 FMI.
1
0-6
Occurrence count.
7
SPN Conversion Method (set to 1)
1
2
0-7
J1939 SPN bits 11-18
3
0-7
J1939 SPN bits 3-10
Table 6-3 Diagnostic Table Entry Content for SPN Conversion Method 1,
Version 1
Word
Byte
Bits
Description
0
0
0-2
J1939 SPN bits 0-2
3-7
J1939 FMI.
1
0-6
Occurrence count.
7
SPN Conversion Method (set to 0)
1
2
0-7
J1939 SPN bits 3-10
3
0-7
J1939 SPN bits 11-18
Table 6-4 Diagnostic Table Entry Content for SPN Conversion Method 1,
Version 2