In Vehicle Communication With Solid Oxide Fuel Cell Using MODBUS Protocol 2005-01-1541
Integration of fuel cell Auxiliary Power Units (APUs) into vehicles requires that the vehicle Electronic Control Unit (ECU) communicate with the fuel cell controller using appropriate protocol. The common communication standard used in automotive systems is the CAN protocol. Some fuel cell controllers originate from stationary power scenarios and communicate using process industry communication protocols such as MODBUS. This paper reviews the MODBUS TCP protocol and CAN protocol. It then describes the MODBUS TCP software driver development for QNX Real Time Operating System (RTOS) used in the SwRI® Rapid Prototyping Electronic Control System (RPECS). The architecture of the communication system on the vehicle and details of RPECS needed to understand the MODBUS drivers are described. Tools such as RPECS™ and EtherPeek™ (TCP/IP packet sniffing software) used during debugging are also briefly described. A new mapping method for conversion between MODBUS and CAN protocols is proposed.
This work has been developed at Southwest Research Institute on the SunLine Project, funded by US Army National Automotive Center.
Citation: Surampudi, B., Gutierrez, P., Foster, R., and Andrews, S., "In Vehicle Communication With Solid Oxide Fuel Cell Using MODBUS Protocol," SAE Technical Paper 2005-01-1541, 2005, https://doi.org/10.4271/2005-01-1541. Download Citation
Author(s):
Bapiraju Surampudi, Pierre Gutierrez, Rhys Foster, Stanley Andrews
Affiliated:
Southwest Research Institute®, Acumentrics Corporation, GD C4 Systems
Pages: 10
Event:
SAE 2005 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
In-Vehicle Networks and Software-SP-1918, Multiplexing and Networking, Volume 2-PT-128
Related Topics:
Fuel cells
Electronic control systems
Auxiliary power units
Electronic control units
Communication protocols
Communication systems
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