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GarrettCom OSI manual

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Table of contents for the manual

  • Page 1

    Industrial Network T rack: Multi-Bus GarrettCom, Inc. 47823 Westinghouse Drive Fremont, CA 94539 PH: (510) 438-9071 FAX: (510) 438-9072 www.GarrettCom.com[...]

  • Page 2

    Industrial Network T rack: Multi-Bus Author Jim W. Hammond – Technical Consultant, GarrettCom, Inc. Keywords: Network integration, Et hernet, TCP/IP, field buses, topology Last time I checked it was reasonably easy to get a bus transfer in NYC, but don’t expect that level of ease when doing transfers from one industrial bus to another. More tha[...]

  • Page 3

    7-Application 6-Presentation 5-Session 4-Transport 3-Network 2-Data Link 1-Physical OSI MODEL If you’ve never seen the OSI mode l, avert your eyes from the follo wing diagram . Too late. It’s not possible to read any book on data co mmunications and networking and avoid seeing this conceptual view of a generi c network architecture. Fortunately[...]

  • Page 4

    Profibus is supported by Siemens and has a large presence in Europe with thre e protocol variations. It supports various media and topologies at speed s up to 12Mbit/s. The PROFINET spin-off is discussed later. Foundation Fieldbus is a special case that st raddles proprietary and open standards. It uses OSI terminology to define its architecture an[...]

  • Page 5

    SUMMARY The open standard networks support multiple topologi es over Ethernet at speeds of 100Mbit/s or better and provide TCP and UDP interfaces. This should make clear the evolution to high speed Ethernet over a variety of topologies. INDUSTRIAL ETHERNET Industrial Ethernet suppor ts the integration of existing sub-networks into a homogeneous net[...]

  • Page 6

    Integrated Substation Network NETWORK INTEGRATION The hard choices of integration include decisions of how to connect to proprietary systems. This will vary from industry to industry. Most legacy sy stem s that continue to perform well are candid ates for some form of gateway interface unless local m ana gement elements are fully effective or isola[...]

  • Page 7

    • Integration: The ability to manage a large ne twork from central or distributed location s, economies of scale, network visibility, and ot her factors without tim e- consuming testing of incompatible interfaces can provide huge benefits. • VLAN support: The ability to define virtual networks for m anaging traffic and security. GATEWAYS Gatewa[...]

  • Page 8

    USING ETHERNET TO NETWORK There are many ways Ethernet components and st andards can be employed to provide redundancy, robustness, security, and flexibil ity of design for m any industrial networks. As has already been mentioned, Ethernet is also the be st integration strategy available to network planners and architects. TOPOLOGY AND REDUNDANCY E[...]

  • Page 9

    interface (CLI) sent to the target component. Usi ng the Secure Socket Layer (SSL) protocol over HTTPS connections provides the sa me level of secu rity enjoyed by W eb-based financial transactions. Simple Network Management Prot ocol version 3 (SNMPv3) lim its access to sensitive Etherne t switches that feature SNMPv3 agent software/f irmwar e. Da[...]

  • Page 10

    Distributed with permi ssion of author by ISA 2006 Presented at ISA EXPO 2006 SUMMARY ON BUS STRATEGIES There are two reasons to maintain pro prietary buses: legacy systems that are still p roviding satisfactory service, and highly tune d and specific applications. Howeve r, in a world where costs, high availability, and future-proofing ar e key op[...]