- Overview
- 1. Introduction
- 2. General Description of the Protocol
- 3. Document Structure
-
4. Fundamentals
- 4.1. Names and Addresses
- Device Names
- Device Address
- 4.2. Parameter Group
- General
- Structure and Type of a Parameter Group
- Example of a Specific Parameter Group
- Parameter Groups reserved specially for the Protocol
- 4.3. Data Management
- Suspect Parameter Number (SPN)
- SLOT Definition
-
5. Network Management
- Network Access
- 5.1. Address Conflict
- Solution and Configurations
- Handling in a Dynamic Network
- 6. Transport Protocols (Multi-packet Messages)
- 7. Diagnostics
Example of a Global Parameter Group
A global PGN is listed below. This is the typical representation of parameter groups in the J1939 standard.
The Global PGN:
PGN 65262 | Engine Temperature | ET1
| Transmission Rate: | 1s |
| Date Length: | 8 |
| Data Page: | 0 |
| Extended Data Page: | 0 |
| PDU Format: | 254 |
| PDU Specific: | 238 |
| PGN Supporting Information: | <optional> |
| Default Priority: | 6 |
| Parameter Group Number: | 65262 (0x00FEEE) |
| Start Position | Length | Parameter Name | SPN |
|---|---|---|---|
| 1 | 1 byte | Engine Coolant Temperature | 110 |
| 2 | 1 byte | Engine Fuel Temperature 1 | 174 |
| 3-4 | 2 bytes | Engine Oil Temperature 1 | 175 |
| 5-6 | 2 bytes | Engine Turbocharger Oil Temperature | 176 |
| 7 | 1 byte | Engine Intercooler Temperature | 52 |
| 8 | 1 byte | Engine Intercooler Thermostat Opening | 1134 |
Note that all parameter groups defined in the J1939-71 document up to now have been transferred to an electronic table (J1939-DA).
Last modified: Thursday, 12 April 2018, 9:25 AM