SAEJ1939 Serial Control and Communications Vehicle Network Presented by Wilfred Voss esd electronics, Inc. 525 Bernardston Road Greenfield, MA 01038 http://www.esd-electronics.us SD Download/View this presentation at: http://www.canseminar.com/Tutorials.html/ @ esd electronics, Inc. · 525 Bernardston Road .Greenfield, MA 01301 Literature Literature on A Comprehensible Guide To Controller Area Network ControllerAreaNetwork CANopen and SAE J1939 Includes SAE J1939 Embedded Networking with CANand CANopen COPPERHILL TECHNOLOCIES ersibleGudeTo 31939 SD Copperhill MediaCorporation http://www.copperhillmedia.com @ esd electronics, Inc. : 525 Bernardston Road .Greenfield, MA 01301 Page 2 esd product Line Serial Control and Communications Vehicle Network SAE J1939 esd electronics provides: : CAN Hardware Interfaces - PCI, cPCI, VME, PMC, PC1O4, ISA, and more CAN Gateways - USB, EtherNet, Bluetooth, IEEE488, and more : CAN Converters - CANopen, DeviceNet, Profibus, and more CAN Embedded Controllers : Drivers and APIs for various operating systems : Free CAN Analyzer software - included with driver esd electronics, Inc. 525 Bernardston Road Greenfield, MA 01301 SD Tel.: 413-773-3170 Fax: 413-773-3171 http://www.esd-electronics-usa.com @ esd electronics, Inc. : 525 Bernardston Road .Greenfield, MA 01301 What is SAE J1939 - General Aspects Serial Control and Communications Vehicle Network SAE J1939 Higher-layer protocol based on Controller Area Network (CAN) : Provides serial data communications between Electronic Control Units (ECU) in any kind of heavy duty vehicles. : Protocol features based on J1708 (RS485) + J1587 : Ingenious protocol design with very little protocol overhead : Driven by data, not myriad of functions as other HLPs : Takes full advantage of all CAN features SD : Detailed documentation only available through SAE @ esd electronics, Inc.· 525 Bernardston Road .Greenfield, MA 01301 Page 4 SAE J1939 Applications Serial Control and Communications Vehicle Network SAE J1939 J1939-based protocols are used in: Diesel power-train applications In-Vehicle networks for trucks and buses Agriculture and forestry machinery (IsO 11783) Truck-Trailer connections Military vehicles (MiLCAN) Fleet management systems Recreational vehicles SD Marine navigation systems (NMEA2000) @ esd electronics, Inc. : 525 Bernardston Road Greenfield, MA 01301 Page 5 What is CAN - General Aspects : Serial Network Technology for Embedded Solutions SAE J1939 : Originally designed by Bosch for automotive industry : Became very popular in industrial automation Network technology established among micro-controllers : Well suited for high speed/real-time applications : Replaces expensive Dual-Port RAM technology : Excellent error detection and fault confinement : Extremely reliable SD : Max. baud rate of 1 MBit/sec - SAE J1939 uses 250 kBit/sec Page 6 @ esd electronics, Inc. · 525 Bernardston Road .Greenfield, MA 01301 SAE J1939 - Ouick Reference Serial Control and Communications Vehicle Network SAE J1939 J1939 takes advantage of CAN features such as: Maximum reliability Excellent error detection & fault confinement Collision-free bus arbitration J1939 Specifics: Shielded twisted pair wire Max. network length of 40 meters (~120 ft.) SD Standard baud rate of 250 kBit/sec Uses 29-Bit Message ID Max. 30 nodes (ECUs) in a network @ esd electronics, Inc. : 525 Bernardston Road Greenfield, MA 01301 Page 7