Designing Real-Time Systems Based on Mono Master Profibus-DP Networks
Ref: HURRAY-TR-0013 Publication Date: 29, Nov, 2000
Designing Real-Time Systems Based on Mono Master Profibus-DP NetworksRef: HURRAY-TR-0013 Publication Date: 29, Nov, 2000
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 real-time traffic is supported either by high-priority or by cyclic poll Profibus messages.
16th IFAC Workshop on Distributed Computer Control Systems (DCCS'2000), pp 36-43.