• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2774-2776
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• 2002

본 논문에서는 리플렉티브 메모리 방식의 산업용 통신망으로 개발된 ERCNet(Ethernet based Real-time Control Network)에 대해서 설명한다. ERCNet은 기존의 리플렉티브 메모리 방식의 네트워크에 비교하여 속도가 빠르고 데이터 처리량이 많다. ERCNet은 갈수록 데이터 양이 증가하고 있는 산업 환경에 적합하도록 만들어졌다. 본 논문에서는 ERCNet의 전체적인 구조와 성능향상을 위해 고안된 기기들에 대해서 설명하고, ERCNet의 성능 척도에 대해 수학적 분석을 행한다. 마지막으로 ERCNet 의 성능에 대한 수학적 분석 결과 수식에 대해 실험을 통해 정확성을 검증한다.

• Journal of Energy Engineering
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• v.14 no.2 s.42
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• pp.112-116
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• 2005

This paper describes the implementation of DCS communication network that provides high bandwidth and reliability. The network for DCS in this paper adopts the Reflective Memory (RM) architecture and Fast Ethernet physical media that have 100 Mbps bandwidth. Also, This network uses Ring Enhancement Device (RED) which is invented to reduce the time delay of each node. The DCS network that is introduced in this paper is named as ERCNet (Ethernet based Real-time Control Network). This paper describes the architecture and working algorithms of ERCNet and performs numerical analysis. In addition, the performance of ERCNet is evaluated by experiment using the developed ERCNet network.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.334-337
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• 2005

This paper describes the implementation of DCS communication network that provides high bandwidth and reliability. The network for DCS in this paper adopts the Reflective Memory (RM) architecture and Fast Ethernet physical media that have 100Mbps bandwidth. Also, this network uses Ring Enhancement Device (RED) which was invented to reduce the time delay of each node. The DCS network that is introduced in this paper is named as ERCNet(Ethernet based Real-time Control Network). This paper describes the architecture and working algorithms of ERCNet and performs numerical analysis. In addition, the performance of ERCNet is evaluated by experiment using the developed ERCNet network.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.54 no.6
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• pp.403-408
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• 2005

As the increasing integrity of VLSI, the BIST(Built-In Self Test) is used as an effective method to test chips. Generally the pseudo-random test pattern generation is used for BIST. But it requires too many test patterns when there exist random This paper proposes and presents a new efficient network architecture for Reflective Memory System (RMS). A time to copy shared-data among nodes effects critically on the entire performance of the RMS. In this paper, the recent researches about the RMS are investigated and compared. The device named Topology Conversion Switch(TCS) is introduced to realize the proposed network architecture. One of the RMS based industrial control networks, Ethernet based Real-time Control Network (ERCnet), is adopted to evaluate the performance of the proposed network architecture for RMS.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1767-1770
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• 2003

This paper proposes an efficient network architecture for reflective memory system (RMS). Using this architecture, the time for broadcasting a shared-data to all nodes can be significantly shortened. The device named topology conversion switch (TCS) is implemented to realize the network architecture. The implemented TCS is applied to the ethernet based real time control network (ERCnet) to evaluate the performance.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2733-2735
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• 2002

본 논문에서는 원자력 발전소용 이더넷 기반 링형 실시간 제어 통신망인 ERCNet(Ethernet-based Real-Time Control Network)에서 고신뢰성을 유지하기 위한 결함 허용 방법들을 제시한다. 임의의 노드의 프로그램 동작에 이상(fault)이 발생하였을 경우, 와치독(Watchdog) 타이머로 탐지하여 링을 자동 복구하고, 그 노드가 다시 회복될 경우의 노드 추가 메커니즘을 제안한다. 이 메커니즘은 한 노드가 전체 네트워크에서 제외되거나 추가될지라도 네트워크가 운용성(operability)을 유지할 수 있도록 한다. 두 번째로, 한 채널 또는 양 채널 에러 발생시 이 에러를 대처하기 위한 채널 이중화 방식과 시스템 이중화 방식에 대해 제안한다. 마지막으로 통신망의 임의의 위치에서 이상이 발생했을 경우 그 발생 위치를 파악할 수 있는 메커니즘을 제안한다.