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

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Design and Implementation of Rate-Based Traffic Controller for Performance Improvement of FA-Networks Employing LonWorks

LonWorks를 이용한 공장자동화용 네트웍의 성능향상을 위한 전송률기반 트래픽제어기의 설계와 구현

  • Kim, Byoung-Hee (School of Electric Electronics and Automation, University of Ulsan ) ;
  • Cho, Kwang-Hyun (School of Electric Electronics and Automation, University of Ulsan ) ;
  • Park, Kyoung-Sup (School of Electric Electronics and Automation, University of Ulsan )
  • 김병희 (울산대학교 전기전자 및 자동화공학부) ;
  • 조광현 (울산대학교 전기전자 및 자동화공학부) ;
  • 박경섭 (울산대학교 전기전자 및 자동화공학부)
  • Published : 2000.04.01
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Abstract

As the interest of flexible manufacturing systems and computer integrated manufacturing systems increase, the distribution of centralized control systems using industrial control networks is getting more attention. In this paper, we investigate the rate-based traffic control of industrial control networks to improve the performance regarding the throughput, fairness, and error rates. Especially, we consider the protocol of Lon-$Works^{(TM)}$ which consists of all OSI 7-layers and supports various communication media at a low cost. Basically, the proposed rate-based traffic control system is closed loop by utilizing the feedback channel errors, which shows improved performance when compared with other industrial control networks commonly operated in open loop. To this end, an additional network node called monitoring node is introduced to check the channel status without increasing the channel load. The Proposed control loop is in effect whenever the feedback channel error becomes greater than an admittable value. We demonstrate the improved performance of the controlled network system in view of throughput and fairness measures by implementing the lab-scale network system based on LonWorks and through the experimentation upon it.

Keywords

References

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