B&B Electronics RS-232 to J1939 Converter CE 1939STB User Manual
Page 40
1939STB4600 Manual
Appendix B
B-1
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445
Appendix B. Example
This example uses the SAE “Electronic Axle Controller #1” (EAC#1). The specifications are as follows:
Transmission Repetition Rate:
500 ms
Data Length:
8 bytes
Data Page:
0
PDU Format:
240
PDU Specific:
5
Default Priority:
6
Parameter Group Number:
61,446 (00F006) hex
Source Address:
249 (off-board diagnostic / service tool #1). See note below.
S
O
F
Priority
3 Bits
R
1
*
D
P
PDU Format (PF)
8 Bits
S
R
S
I
D
E
PF
Cont.
PDU Specific
8 Bits
Source Address
8 Bits
(See note below.)
R
T
R
X 1 2 3 1 1 1 2 3 4 5 6 X X 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 X
X
1 2 4 5 6 7 8 9 10 11 12
X X
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
X
X Byte 7
Byte 8
X X
Byte 8 cont.
Byte 9
Byte 10
X
X 7
6
5
4
3
2
1
0 7
6
5
X X 4
3
2
1
0
7
6
5
4
3
2
1
0
7 6 5 4 3 X
X 1
1
0
0
0
1
1
1 1
0
0
X X 0
0
0
0
0
0
0
1
0
1
X
X
X X
X
* R1 is the reserved bit. ALL messages should set the SAE reserved bit to 0 on Transmit.
Byte 7
Binary
Convert to
Hex
Convert to
Decimal
7 6 5 4 3 2 1 0
1
1 0
0 0 1
1 1 C7
199
The hex number is the value sent to the 1939STB.
NOTE: See SAE J1939–81 for Source Address management.