Message Information
Table 22. J1939 Message Information
Message Information
B |
| B |
| B | B | B | B | B | ||||
5 |
| 6 |
| 7 | 8 | 9 | 10 | 11 |
| |||
| 95 |
|
| E7 |
| 0C | 80 | 00 | 40 |
| 8C |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The message information controls the action of the message. It also contains the header information that will be sent out on the J1939 bus. The bytes that control the message and are not transmitted to the bus are grayed in. Byte 5 and 6 are the message control bytes. They work together to control the message. The bit fields are set up in a two bit configuration as follows: NOTE: Byte 11 covered on page 18.
Table 23. Two Bit Values for Byte 5 and 6
Value of 2 bit field |
| Function on write |
| Function on read | |||||||
0 |
| 0 |
| Reserved |
| Reserved | |||||
| 0 |
|
| 1 |
|
| Reset element |
|
| Element is reset |
|
| 1 |
|
| 0 |
|
| Set element |
|
| Element is set |
|
| 1 |
|
| 1 |
|
| No change |
|
| Reserved |
|
The bit values shown in gray are the only values valid for the setup of the 1939STB.
1939STB4600 Manual | 15 |
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