The quest for greater flexibility in the industrial environment, leads to the installation of industrial Local-Area Networks (iLANs). Such networks may be either Fieldbuses or networks for the solution of problems at the Shop Floor level. The need for interoperability and the creation of a vendor independent environment have led to the creation of a special committee under the auspices of the Instrument Society of America (ISA), for the definition of a single standard for fieldbuses, that will in the long term replace the various already available commercial de facto standards. This paper handles with problems associated with the Upper Layers of the OSI-RM as defined for Fieldbuses and presents a case study implementation.
Fieldbuses, MMS, Network Management, User Layer, lnteroperabilily
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