Dynamic Address Configuration in SAE J1939

Document Number: 972759

Date Published: September 1997

Author(s):
Dr Marvin L Stone - Oklahoma State Univ

Abstract:
SAE J1939 is an emerging communications protocol for on-board electronics in agricultural and construction equipment as well as for heavy-duty, on-highway equipment. The standard supports ECUs with both statically and dynamically configured addresses. This paper examines the dynamic addressing process, the process for ECUs that select addresses during initial power-up. A state diagram is proposed to implement the process described in the standard. Simulation results of systems with up to 100 dynamically configured ECUs are presented. Use of a pseudo-random delay after a power-ON self-test was successful in minimizing bus-off collisions and allowed initialization times of under 1 second for 30 ECU systems. Minimum bus-off states during initialization of 30 ECU networks occurred with pseudo-random delays having a range of 0 to 15 ms.

Save money while getting up-to-date access to the standards you need! Subscribe to the SAE J1939 Standards Collection on the Web and get one year of anytime access and automatic updates to the J1939 family of documents, plus all cross-referenced and selected related documents.

File Size: 322K
Product Status: In Stock

Purchase more technical papers and save! With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay. Learn more >