W. Elmenreich, W. Haidinger, P. Peti, and L. Schneider (Austria)
Real-Time Systems, Embedded Systems, Plug-and-Play, Smart Transducer
The configuration and maintenance of fieldbus networks is a difficult and error-prone task. Plug-and-Play comes to the rescue by automating node identification, integration and configuration tasks that were originally done manually. This paper proposes a Plug-and-Play functionality for the time-triggered fieldbus protocol TTP/A that works during operation concurrently to real-time communication on the same bus. While Plug-and-Play is widely adopted in personal computer world, the many existing fieldbus protocol stan dards complicate the introduction of consistent and vendor spanning Plug-and-Play systems. This paper introduces a seamless integration of Plug-and-Play into the existing TTP/A low-cost framework, without any modification to the original TTP/A protocol. It gets around the problem in master-slave addressing where the master doesn’t know the identification of the new nodes.
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