Observing of near field information to analyse a master-slave fieldbus

A novel approach to analyse Quality of Service (QoS) and Data Transfer in a flexible and robust field area network (FAN) is presented. Based on the special fieldbus system architecture an analysing tool using the cables near field information was implemented. Contactless access to the network traffic is an approach to minimize retroactive effects of the analysing tool onto the network. Therefore, possible sensor coupling and the influence of different methods onto signal quality at the analyser and retroaction to the net are shown in this paper. They were verified by simulations and tests in a prototype environment.