전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제58권2호
  • /
  • Pages.407-414
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  • 2009
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  • 1975-8359(pISSN)
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  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

파운데이션 필드버스에서 두 개의 우선순위 데이터를 갖는 노드의 데이터 전송지연시간에 관한 연구

Study on the Transmission Delay of Two Priority Classes in One Node in the Foundation Fieldbus

  • 이용희 (한양대학 전자전기제어계측학과) ;
  • 홍승호 (한양대학 전자정보시스템공학)
  • 발행 : 2009.02.01
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초록

The foundation fieldbus(FF) is one of the fieldbuses most widely used for process control and automation, In order for system designer to optimize medium management, it is imperative to predict transmission delay time of data. In a former research, mathematical modeling to analyze transmission delay of FF token-passing system has been developed based on the assumption that a device node has only one priority data(1Q model), From 1Q model, all of the device nodes, which are connected on the FF system, are defined priority level in advance, and as system operates, data are generated based on given priority level. However, in practice, some non-periodic data can have different priority levels from one device. Therefore, new mathematical model is necessary for the case where different priority levels of data are created under one device node(2Q model). In this research, the mathematical model for 2Q model is developed using the equivalent queue model. Furthermore, the characteristics of transmission delay of 2Q model which is presented in this paper were compared with 1Q model. The validity of the analytical model was verified by using a simulation experiment.

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참고문헌

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