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FC9Y-B1730 8-1
8: J1939 COMMUNICATION
This chapter describes J1939 communication in the CAN J1939 All-in-One Type.
The following abbreviations are used in the text to simplify the descriptions.
Overview of J1939 Communication over CAN
The CAN J1939 All-in-One Type is compatible with CAN communication based on SAE J1939. The CAN J1939 All-in-One Type can
communicate with other J1939 communication-compatible devices by connecting the CAN port to a J1939 communication
network. For details on J1939 communication, refer to the SAE J1939 standard.
SAE J1939 Overview
J1939 Communication Network
A J1939 communication network is composed of ECUs (engine, brake, etc.) and NIECUs (repeaters, routers, etc.), and each ECU
has one or more CAs. A CA is assigned an address between 0 and 253 and a unique 64-bit ID (NAME), and messages can be
exchanged between CAs using the addresses.
Abbreviation Official Name
CAN Controller Area Network
ECU Electronic Controller Unit
NIECU Network Interconnection ECU
CA Controller Application
PDU Protocol Data Unit
PGN Parameter Group Number
SA Source Address
DA Destination Address
SAE Society of Automotive Engineers
SPN Suspect Parameter Number
CAN CAN
ECUECU NIECU
Bridge Bridge
TerminatorTerminator
ECU ECU
TerminatorTerminator
ECU ECU
TerminatorTerminator
CACACA CA
CA CA
CA CA
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