• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.31-36
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• 1992

This paper describes the development of a 'General-purpose ETRI MAP interface module' (GEM) for a Mini-MAP network. GEM operates as a Mini-MAP node in our FA system. To communicate between GEM and programmable devices such as PLC, CNC, and robot, RS232C is used, which is a traditional method. A Mini-MAP host system controls and monitors programmable devices via GEM. The Mini-MAP function of GEM is implemented and tested on the basis of the MAP V3.0.

• 전자공학회논문지B
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• 제32B권3호
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• pp.1-10
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• 1995

In this paper, a fault-tolerant Mini-MAP system with high reliability is proposed. For fault-tolerance, the LLC sublayer, MAC sublayer, and physical layer of the Mini-MAP system are dualized. The detection of faults, the replacement of the failed network, and the management of the network are three major functions required for the dualization, and they are performed by ESM(Error Supervisory Machine), EMM(Error Management Machine), and NMM(Network Management Machine) of the proposed fault-tolerant Mini-MAP system, respectively. The ring maintenance function of the MAC sublayer is used for the detection of the faults. In the proposed fault-tolerant Mini-MAP system, the data are received from both of the dualized networks and transmitted to the selected one of the two. We analyze the reliability and the MTTF(Mean Time To Failure) of the proposed fault-tolerant Mini-MAP system and show that it has better performance compared to a general Mini-MAP system.

• 제어로봇시스템학회논문지
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• 제4권2호
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• pp.264-272
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• 1998

This paper proposes a fault detection and recovery mechanism for a fault-tolerant Mini-MAP system, and provides detailed techniques for its implementation. This paper considers the fault-tolerant Mini-MAP system which has dual layer structure from the LLC sublayer down to the physical layer to cope with the faults of those layers. For a good fault detection, a redundant and hierarchical fault supervision architecture is proposed and its implementation technique for a stable detection operation is provided. Information for the fault location is provided from data reported with a fault detection and obtained by an additional network diagnosis. The faults are recovered by the stand-by sparing method applied for a dual network composed of two equivalent networks. A network switch mechanism is proposed to achieve a reliable and stable network function. A fault-tolerant Mini-MAP system is implemented by applying the proposed fault detection and recovery mechanism.

• ETRI Journal
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• 제14권4호
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• pp.165-178
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• 1992

본 고는 Mini-MAP 네트워크의 접속장치를 구현한 내용이다. 이 접속장치는 공장자동화 네트워크 시스팀에서 Mini-MAP 노드로 동작하며, PLC, CNC, robot와 같은 프로그래머블 디바이스를 MAP 네트워크 환경에 접속하여 원격제어가 가능하도록 하는 네트워크 구축을 위한 핵심 장치이다. 이 접속장치는 MAP 3.0의 Mini-MAP으로 구현하고 실현하였다. MAC 부계층은 Token Bus Controller(TBC)가 담당하며, LLC 부계층은 class 3로 설계하였고, MMS는 implementaton class MAP3를 설계하였다. 구현된 모든 소프트웨어는 Mini-MAP의 실시간 정보 전송 성능을 보증하기 위해 real-time 멀티 태스크 OS로 운영하도록 설계하였으며, 보드에 firmware로 탑재하였다. 프로토콜 분석기를 이용하여 LLC 수준의 오류검출과 전송기능을 확인하였으며, MMS는 적합성 시험을 이미 받은 MMS를 탑재한 상용 제품과의 통신 실험을 통해 적합성을 확인하였다.

• 전자공학회논문지A
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• 제30A권12호
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• pp.1-9
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• 1993

In this paper, to realize the network management function in automated manufacturing network Mini-MAP, the network management requirements are analyzed and the network management system is implemented on the basis of this analysis. The implemented management system which has both local management and remote management mechanism is considered as a single domain on the Mini-MAP network. Here, the remote management functions consist of network status, monitoring and remote operations and the local management functions have parameter display and network self testing. The MAP network controller is designed according to the MAP version 3.0 specifications and IEEE 802 standards. the operations of network management system are certified througth the test environments which consists of the implemented network adaptor and softwares for Mini-MAP.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.382-388
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• 1987

In this paper, the performance of Mini MAP architecture is analyzed by simulation method. Token rotation time and waiting time are obtained by simulation. The results of the simulation are compared with these of the analytic model. From these comparisons, it is shown that simulation results are approximately identical to analytic results. Mini MAP architecture has good real time performances in token rotation time and waiting time and can be used to many real time applications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.221-225
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• 1987

In this paper, the performance of Mini MAP architecture in realtime application is analyzed by analytic methods. The approximate equations for token rotation time and waiting time are obtained and using these equations network. performance is evaluated. According to the results obtained, Mini MAP architecture has good realtime performance and can be used to many real time applications.

• 전자공학회논문지B
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• 제30B권10호
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• pp.59-68
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• 1993

This paper describes implemation of 'General-purpose ETRI MAP interface module' (GEM) for Mini-MAP network. GEM operates as a Mini-MAP node in our FA system. To communicate between GEM and programmable devices(PD) such as PLC and CNC, serial communication is used. Application programs of a MiNi-MAP host system control and monitor programmable devices via GEM. GEM is implemented and tested on the basis of the MAP 3.0. TBC in the Nini-MAP board performs the function of the MAC sublayer. The LLC sublayer is implemented according to the specification of Class 3 that includes Type 1 and 3. And the MMS services are designed within the scope of implementation class MAP3. All the softwares are implemented under the real-time multitask OS for real-time application of the Mini-MAP and they are loaded into PROMs at the network board of GEM. We tested the LLC functions to make use of a protocol analyzer for the token-passing protocol. Also the MMS conformance test was carried out by exchanging primitives between GEM and a MMS product that had already passed the conformance test. Therefore GEM is proposed as a network tool of Computer Integrated Manufacturing (CIM) to integrate PDs which don't support MAP functions.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.342-346
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• 1991

산업공정현장에서는 독립적으로 운영되고 있는 프로그램식 단위제어기기들에 대한 연계운영을 위하여 실시간 처리 소규모 네트워크가 도입되어 구축운영되고 있다. 특히 제조생산공정에서는 계층화된 분산 구조로서 공정정보처리를 위하여 공장환경에 적절한 네트워크 구축을 MAP등의 표준화된 규격에 의하여 권고되고 구현되어 운영되고 있다. 본 논문에서는 공장 환경에서의 표준규격으로 제안된 Mini MAP을 기준으로 하여 물리 및 데이타 링크계층을 Petrinet 기법을 활용하여 실시간 처리를 위한 개선된 모델을 제안하고 네트워크의 성능측정 및 시뮬레이션을 수행하였다. 또한 이 모델에 의하여 토큰버스 네트워크를 구성하여 전송 서비스시간과 메세지 처리율을 분석하고 Mini MAP 규격과 함께 성능을 해석하였다.

• 한국정보처리학회논문지
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• 제1권2호
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• pp.263-271
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• 1994

제조장치의 네트워크 환경은 PLC, 로보트와 같은 프로그래머블디바이스에 Mini- MAP 네트워크 접속장치를 장착하여 원격제어가 가능한 공정한 네트워크 시스템 구성 이 연구되고 있다. 본 논문에서 설계된 공정 네트워크 접속장치는 MAP 3.0 규격을 근거로 MAC부 계층은 TBC(token bus controller)가 수행하고, LLC부 계층은 class 3으로, 응용계층은 MMS(manufacturing message standard)를 기본으로 설계하였다. 구현된 소프트웨어는 Mini-MAP의 실시간 정보 전송 성능을 보존하기 위하여 C Exec. 의 real-time executive를 기반으로 설계하여 firmware로 탑재하였다. 본 접속장치는 군관리 공정 모델에서 시험 운영하였으며, LLC 계층의 오류검출과 전송기능은 프로토 콜 분석기를 이용하여 확인하였으며, MMS는 적합성 시험을 이미 받은 MMS를 탑재한 상용제품과의 통신운영을 통하여 적합성 시험을 확인하였다.