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COMMUNICATION PROTOCOLS
6.3
SAE J1939 MESSAGES AND MESSAGE FORMAT
J1939 (+), J1939 (-), and J1939 Shield are used as the J1939 communication link.
The message format uses the parameter group number as the label for a group of parameters.
Each of the parameters within the group can be expressed in ASCII, as scaled data, or as function
states consisting of one or more Bits. Alphanumeric data will be transmitted with the most
signi
fi
cant byte
fi
rst. Other parameters consisting of two or more data bytes shall be transmitted
least signi
fi
cant byte
fi
rst. The type of data is also identi
fi
ed for each parameter.
The following sections identify the parameters that are supported by DDEC.
The J1939 source address can be set for various components as listed in Table 6-3.
Parameter
Group
Parameter
Options
Default
Access
1
EBC1 Source Address SAE J1939
0–255
33
VEPS, DRS
1
TSC1 Source Address SAE J1939
0–255
231
VEPS, DRS
1
CC1 Source Address SAE J1939
0–255
23
VEPS, DRS
1
CC2 Source Address SAE J1939
0–255
33
VEPS, DRS
1
CC3Source Address SAE J1939
0–255
49
VEPS, DRS
1
CM1 DPF Source Address SAE J1939
0–255
49
VEPS, DRS
1
CM1 Fan Source Addr1 SAE J1939
0–255
49
VEPS, DRS
1
CM1 Fan Source Addr2 SAE J1939
0–255
49
VEPS, DRS
Table 6-3
J1939 Source Address
6-28
All information subject to change without notice.
(Rev. 01/07)
7SA827 0701
Copyright © 2007 DETROIT DIESEL CORPORATION