Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Implementation and Experimental Evaluation of Bandwidth Allocation Scheme on PROFIBUS

PROFIBUS에서 대역폭 할당 기법 구현 및 실험적 평가

  • 홍승호 (한양대학교 전자컴퓨터공학부) ;
  • 김유철 (아이콘트롤스 기술연구소) ;
  • 김지용 (원클릭테크놀로지스 기술연구소)
  • Published : 2000.11.01
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Abstract

Fieldbus is the lowest level industrial network in the communication hierarchy of factory automation and distributed process control systems. Data generated from field devices are largely divided into three categories : time-critical, periodic and time-available data. Because these data share one fieldbus medium, it needs a method that allocates these data to the bandwidth-limited fieldbus medium. This paper introduces an implementation method of bandwidth allocation scheme on PROFIBUS. In order to implement bandwidth allocation scheme on PROFIBUS, the following functions need to be supplemented on the FDL(Fieldbus Datalink Layer) protocol: (i) separation of medium bandwidth into periodic and non-periodic intervals, (ii) synchronization of node timers over a local link. In order to examine the validity of bandwidth allocation scheme on PROFIBUS, this paper develops an experimental model of a network system. The results obtained from the experimental model show that the bandwidth allocation scheme satisfies the performance requirement of time-critical, periodic and time-available data.

Keywords

References

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