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6 J1939 Communication Mode
6.1 Send/Receive Data Buffer
48
FX
3U
-J1939 User's Manual
6. J1939 Communication Mode
6.1
Send/Receive Data Buffer
The FX
3U
-J1939 supports 75 standard messages (with up to 8 bytes) and 4 extended messages (with up to
250 bytes). It is also possible to combine several standard messages for data packages up to 250 bytes.
6.1.1
[BFM #100 to #399] Send/receive data buffer for standard messages
These BFMs are used to buffer network data.
For details, see the manual of the source/target module or the corresponding J1939 specification
For the extended data area, refer to Subsection 6.1.2
For the Configuration area, refer to Section 6.2
BFM No.
Transmit/Receive Data
Message No.
High Byte
Low Byte
BFM #100
2nd data byte
1st data byte
Message 1
BFM #101
4th data byte
3rd data byte
BFM #102
6th data byte
5th data byte
BFM #103
8th data byte
7th data byte
BFM #104
2nd data byte
1st data byte
Message 2
BFM #105
4th data byte
3rd data byte
BFM #106
6th data byte
5th data byte
BFM #107
8th data byte
7th data byte
BFM #108
2nd data byte
1st data byte
Message 3
BFM #109
4th data byte
3rd data byte
BFM #110
6th data byte
5th data byte
BFM #111
8th data byte
7th data byte
...
...
....
.
...
...
....
.
...
...
....
.
...
...
....
.
BFM #396
2nd data byte
1st data byte
Message 75
BFM #397
4th data byte
3rd data byte
BFM #398
6th data byte
5th data byte
BFM #399
8th data byte
7th data byte