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Improving the real-time performance of Ethernet for plant automation (EPA) based industrial networks

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Abstract

Real-time Ethernet (RTE) control systems with critical real-time requirements are called fast real-time (FRT) systems. To improve the real-time performance of Ethernet for plant automation (EPA), we propose an EPA-FRT scheme. The minimum macrocycle of EPA networks is reduced by redefining the EPA network frame format, and the synchronization process is modified to acquire higher accuracy. A multi-segmented topology with a scheduling scheme is introduced to increase effective bandwidth utilization and reduce protocol overheads, and thus to shorten the communication cycle significantly. Performance analysis and practical tests on a prototype system show the effectiveness of the proposed scheme, which achieves the best performance at small periodic payload in large scale systems.

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Correspondence to Li Lu or Dong-qin Feng.

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Project supported by the National High-Tech R&D Program (863) of China (No. 2008AA042602) and the National Natural Science Foundation of China (Nos. 61075078 and 61074028)

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Lu, L., Feng, Dq. & Chu, J. Improving the real-time performance of Ethernet for plant automation (EPA) based industrial networks. J. Zhejiang Univ. - Sci. C 14, 433–448 (2013). https://doi.org/10.1631/jzus.C1200363

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  • DOI: https://doi.org/10.1631/jzus.C1200363

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