Abstract

Industrial networks are a special kind of local area networks, with well defined attributes. The three characteristics of industrial networks are: deterministic channel access delay, predictable performance and reliability forward hostile environments. This paper presents a low cost prototype of microcomputer industrial local area network cost with these characteristics, based on two optical fiber rings and token passing medium access protocol. The main issues of this network are to be a testbed network for real time protocol evaluation and offer a good ratio between performance and cost for industrial applications.

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