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B&B Electronics 1939STB manual Bytes 9 and

Models: 1939STB

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Bytes 9 and 10

(Shown in Table 31)

Bits 7, 6, 5, 4 and 3 complete the PDU.

Bits 2, 1, and 0 of byte 9 and bits 7, 6, 5,and 4 of byte 10 are the Source Address for the converter. Each Source Address MUST be unique. SAE J1939-81 describes address management and allocation in detail and should be consulted before connecting to a J1939 bus. Addresses 249 and 250 are designated for offboard diagnostic service tools. WARNING: These addresses are SUGGESTED. The procedure described in SAE J1939-81 should be followed when connecting to any unknown bus.

1939STB4600 Manual

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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

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B&B Electronics 1939STB manual Bytes 9 and

Contents

European Headquarters Model 1939STBRS-232 to J1939 Converter CE International HeadquartersINTERNAL MESSAGES Table of ContentsINTRODUCTION SAE-J1939 CONTROL HEADERSurface Vehicle Recommended Practice IntroductionFax +353 91 1939STB4600 ManualDescription Electrical Specification Physical Description1939STB4600 Manual Communication directed to the device Format Table 5. Transmit Data Format Control ByteTable 3. Bits of Byte Table 4. Byte 3 Nibble1 of control byte 4 has the following functions Table 10. Message Received from the SAE-J1939 Bus Table 9. Vendor String SetupInternal Functions Vendor StringTable 11. Baud Rate Setup Table 12. Baud Rate SetupRS-232 Baud Change Table 13. Baud Rate Setup RS-232 Baud Rate Change - cont’d1939STB4600 Manual Table 14. Byte 5 UB3 Table 15. Parity SetupRS-232 Baud Rate Change cont’d Byte 5 UB31939STB4600 Manual default valueBit 2 stop bit works in conjunction with bits 1 and bit Bits 1 and 0 set the word lengthTable 18. J1939 Format External CommandsTable 20. Valid Codes for Byte Message Header Setup1939STB4600 Manual Table 19. J1939 Message HeaderTable 23. Two Bit Values for Byte 5 and Message Information Table 22. J1939 Message Information1939STB4600 Manual Byte Table 24. ByteTransmit Byte Table 25. ByteByte Table 26. Byte XTD Bit21939STB4600 Manual Table 27. J1939 Message Frame SAE-J1939 Control Header1939STB4600 Manual Shown in Table Byte1939STB4600 Manual Bits 7, 6, 5, 4, and 3 of Byte 8 along with Bits 2, 1, and 0 of Byte 7 make up the first part of the PDU Protocol Data Unit. The first 8 bits are the PDU format. The values for specific formats will have to be supplied by the user Byte1939STB4600 Manual Bytes 9 and 1939STB4600 Manual DIR Message Direction ByteByte DLC Data Length CodeControl Data FieldTable 35. J1939 Message Frame Arbitration FieldTable 37. Function Reception of DataSAE-J1939 Bus ID ByteFunction 1939STB4600 ManualTable 38. MC Table 39. Message Received from the SAE-J1939 Bus Internal MessagesInstallation Software1939STB4600 Manual Message Transmission sending data to the 1939STB Message Reception1939STB4600 Manual File Logging Saving Message InformationAppendix A. The Extended CAN / SAE-J1939 Message Frame Arbitration Field 1939STB4600 ManualAppendix A Source Address Appendix B. Example