B&B Electronics 1939STB manual Data Field, J1939 Message Frame

Data Field

The next 8 bytes are the data field and can have from 0 to 8 bytes used. This is the data payload.

Table 35. J1939 Message Frame

Arbitration Field

Control

Data

CRC

ACK

EOF

S

Identifier

S

I

Identifier

R

R

R

D

O

(11 bits)

R

D

Extension

T

1

0

L

F

S

E

(18 bits)

R

C

1

11 bits

1

1

18 bits

1

6

bits

64 bits

16 bits

2 bits

7 bits

The remaining fields are handled by the controller and are not accessible through the converter.

28 1939STB4600 Manual

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