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FC6A S
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ANUAL
FC9Y-B1730
8-1
8: J1939 C
OMMUNICATION
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
ECU
ECU
NIECU
Bridge
Bridge
Terminator
Terminator
ECU
ECU
Terminator
Terminator
ECU
ECU
Terminator
Terminator
CA
CA
CA
CA
CA
CA
CA
CA