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SAE J1939 defines five layers in the seven-layer OSI network model, and this includes the Controller Area Network (CAN) ISO 11898 specification (using only the 29-bit/"extended" identifier) for the physical and data-link layers. Under J1939/11 and J1939/15, the data rate is specified as 250 kbit/s, with J1939/14 specifying 500 kbit/s.
Agricultural implement ISOBUS plug. ISO 11783, known as Tractors and machinery for agriculture and forestry—Serial control and communications data network (commonly referred to as "ISOBUS") is a communication protocol for the agriculture industry based on, and harmonized with, the SAE J1939 protocol (which is based on the CAN bus).
They are both required to be accessed through a standardized data link connector defined by SAE J1962. Heavy duty vehicles (greater than 14,000 lb or 6,400 kg) made after 2010, [1] for sale in the US are allowed to support OBD-II diagnostics through SAE standard J1939-13 (a round diagnostic connector) according to CARB in title 13 CCR 1971.1 ...
J1939 and ISO 11783 – an adaptation of CAN for commercial (J1939) and agricultural (ISO 11783) vehicles; Keyword Protocol 2000 (KWP2000) – a protocol for automotive diagnostic devices (runs either on a serial line or over CAN) LIN – (Local Interconnect Network) a very low cost in-vehicle sub-network
J1708 – RS-485 based SAE specification used in commercial vehicles, agriculture, and heavy equipment. J1939 and ISO11783 – an adaptation of CAN for agricultural and commercial vehicles; Keyword Protocol 2000 (KWP2000) – a protocol for automotive diagnostic devices (runs either on a serial line or over CAN)
The data are coded according to SAE J1939. The repetition rate of the data is between 20 ms (e.g. engine speed) and 10 seconds (e.g. vehicle identification number). With the FMS standard it is now possible to have manufacturer independent applications and evaluations of the data.
RV-C draws heavily from the SAE J1939 protocol. The primary differences between J1939 and RV-C are: SAE J1939 does not support RV-C's "instancing". The main diagnostic message (DM1) has somewhat different formats, due to the need in RV-C for instance identification. The SAE J1939 NAME PGN is simplified in RV-C.
Main building of the headquarters of Vector Informatik GmbH. Vector Informatik develops software tools and components for networking of electronic systems based on the serial bus systems CAN, LIN, FlexRay, MOST, Ethernet, AFDX, ARINC 429, [4] and SAE J1708 as well as on CAN-based protocols such as SAE J1939, SAE J1587, ISO 11783, NMEA 2000, ARINC 825, [4] CANaerospace, [4] CANopen and more.