In this post, I would like to address what is arguably the most important concept in the SAE J1939 standard: the Parameter Group Number (PGN). PGNs are the heart and soul of J1939. Every application you design, whether it transmits engine speed, requests a VIN, or reports diagnostic information, revolves…
Posts tagged as “J1939/71”
This article is part of our comprehensive SAE J1939 online documentation. The primary document describing the J1939 message format is SAE J1939/21 – Data Link Layer. This specification defines the use of the CAN data frame (29-bit identifier, Parameter Group Numbers – PGN, etc.) as well as the transport protocol…
This article is part of our comprehensive SAE J1939 online documentation. The SAE J1939 Standards Collection serves as the comprehensive framework for communication and control within truck, bus, and off-road vehicle networks. It defines how electronic control units (ECUs) exchange data over the Controller Area Network (CAN), detailing message structures,…
