ICP DAS USA GW-7228 User Manual page 26

J1939 Device Name
The J1939 NAME is a 64-bit value that must be unique for every
module on J1939 network. NAME are composed of fields as shown in
Table 3-4
Table 3-4 J1939 NAME Fields
Arbitrary Vehicle
Industry
Address System
Group
Capable Instance
1 bit 3 bit 4 bit
Byte 8
J1939 Input/Output Table
The J1939 Input/Output table is used define the content and format of
the J1939 messages. The Data from J1939 messages that are to be
transmitted are mapped to the locations in the input or output table
GW-7228 J1939/Modbus RTU Slave Gateway User's Manual (Ver 1.3, Apr/2011) ------------- 26
Figure 3-6: J1939 Device Name Screen
Vehicle
Reserved
System
7 bit 1 bit
Byte 7
Function ECU
Function
Instance Instance
8 bit 5 bit 3 bit
Byte 6 Byte 5
Manufacturer Identity
Code Number
11 bit 21 bit
Byte Byte Byte Byte
4 3 2 1