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Orientador(es)
Resumo(s)
Profibus networks are widely used as the communication infrastructure for
supporting distributed computer-controlled applications. Most of the times, these
applications impose strict real-time requirements. Profibus-DP has gradually become the
preferred Profibus application profile. It is usually implemented as a mono-master
Profibus network, and is optimised for speed and efficiency. The aim of this paper is to
analyse the real-time behaviour of this class of Profibus networks. Importantly, we
develop a new methodology for evaluating the worst-case message response time in
systems where high-priority and cyclic low-priority Profibus traffic coexist. The proposed
analysis constitutes a powerful tool to guarantee prior to runtime the real-time behaviour
of a distributed computer-controlled system based on a Profibus network, where the realtime
traffic is supported either by high-priority or by cyclic poll Profibus messages.
Descrição
Palavras-chave
Fieldbus networks Real-time communication