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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.