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CAN Primer: Creating your own Network

Authored on: Apr 8, 2009 by Robert Boys

Technical Paper

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There are many "application" layers available for CAN such as ISO 15765 (cars), J1939 (trucks), DeviceNET and CANopen (these are for factory automation). CAN has become the standard for vehicle networks, but it has been adopted in most other fields. As you find out in these pages, there are no attributes in the Bosch CAN specification that are automotive related. It is completely generic. You can easily implement your own protocol on top of CAN to fit your needs. This primer will guide you in making the right choices when implementing a system.

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MKI Posted Apr 9, 2011

What is the difference between CAN layers ISO 15765 for cars & j1939 for trucks. Thanks

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Bizzztlund Posted Apr 13, 2011

J1939 is a complete description of the CAN-system used in a truck. 15765 is only the diagnostic part normally available in the OBDII connector under your steering wheel. The actual CAN-communication in the car is mostly propreity and different in different car models. Kent /kvaser.com

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