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3.7.3 Application fields
Academic project
Vehicle diagnostic scanning tools
Digital dashboard
Fleet tracking and management
OBD data-logging recorde
3.8 J1939 Interface (optional)
3.8.1 Overview
The J1939 interface of PC-7146 is recommend for heavy-duty truck applications.
And supports SAE J1939 and SAE J1708/J1587 protocols.
SAE J1939 (hereinafter referred to as J1939) is the recommendation of Society
of Automotive Engineers (SAE), which provides a standard architecture for
communications between electronic components on medium-heavy vehicles. It
is developed and written by Track & Bus Control and Communications Network
Subcommittee, which is the subordinate of Track & Bus Electrical & Electronics
Committee.
J1708 is a SAE standard based on the RS-485, which can be used in agricultural
vehicles, commercial vehicles and heavy machinery, and is released and
maintained by the SAE. Mainly used for serial communication between the
heavy vehicle ECU or between the vehicle and the computer. It's associated with
the OSI model, J1708 mainly defines the physical layer. The usual high-level
protocol to run on J1708 is SAE J1587 (TMC/SAE joint of microcomputer system
for electronic data interchange in heavy vehicles) and SAE J1922 (used for
electronic control transmission interface of diesel vehicles for medium and heavy
roads).
3.8.2 Support protocol
SAE J1939
SAE J1708/J1587
3.8.3 Application fields
Fleet management and tracking devices
Vehicle diagnostic scanning tools and code reader
Sensor with J1939 / J1708 and CAN bus protocol
Digital dashboar
