Journal of Platform Technology

ICT Platform Society (ICT플랫폼학회)
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Design and Analysis of Cell Controller Operation for Heat Process

열공정에 대한 셀 콘트롤러 운영의 설계와 해석

  • Received : 2020.06.09
  • Accepted : 2020.06.29
  • Published : 2020.06.30
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Abstract

The construction and operation of industrial automation has been actively taking place from manufacturing plan to production for improving operational efficiency of production line and flexibility of equipment. ISO/TC184 is standardizing on operating methods that can share information of programmable device controllers such as PLC and IoT that are geographically distributed in the production line. In this study, the design of the cell controller consists of PLC group and IoT group that perform signals such as temperature sensors, gas sensors, and pressure sensors for thermal processes and corresponding motors or valves. The operation and analysis of the cell controller were performed using SDN(Software Defined Network) and the three types of process services performed in thermal processes are real-time transmission service, loss-sensitive large-capacity transmission service, and normal transmission service. The simulation result showed that the average loss rate improved by about 17% when the traffic increased before and after the application of the SDN route technique, and the delay in the real-time service was as low as 1 ms.

생산라인의 운영 효율화, 설비의 융통성을 위하여 제조계획부터 생산에 이르기까지 산업자동화의 구축과 운영이 활발히 이루어지고 있다. ISO/TC184는 생산라인에서 지역적으로 분산되어 있는 PLC, IoT 등 프로그램식 단위제어기기(Programmable Devices)들의 정보를 공유할 수 있는 운영방식들에 대한 표준화가 진행 중이다. 본 연구에서 셀 콘트롤러의 설계는 열 공정에 대한 온도센서, 가스센서, 압력센서 등의 신호와 이를 대응하는 모터나 밸브 등의 동작을 수행하는 PLC그룹과 IoT 그룹으로 구성하였다. 셀 콘트롤러의 동작과 해석은 SDN(Software Defined Network)를 활용한 열공정에서 수행되는 공정 서비스 유형으로는 실시간(real-time) 전송 서비스, 손실에 민감한 대용량 전송 서비스, 일반(normal) 전송 서비스로 세 종류로 설정하고 수행하였다. 모의실험 결과는 SDN 경로 기법을 활용하여 결과 트래픽 증가 시에 평균 손실률은 약 17% 개선되었고, 실시간 서비스의 지연은 1ms의 낮은 수준으로 성능향상을 확인할 수 있었다.

Keywords

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