Net Communication Interface And Application System Development Based On INFI-90

AbstractDiStribued Control System(DCS) is abroad aPplied to the industry ofelectric power,chemicals and metallurgy in our countryand its rePresentatveProduCt,INFI-90 Distributed Control System,is more widely used.BUt along withits abroad aPPlications,its defects are more and more exposed .And itS defectsmainly consist in its low oPenness and slow system uPdate.The article,aimed atthe problems of the INFI-90 Distributed Contrl System,maiuly fulfills thefollowing research and development tasks:l. ImPlemen the data read and write inteface of the INFI-90 DistributedColltrOl System.It not only may read process data,but aIso writC dare illto theIN'Fl-90 system.2' DeveloP the net conunnication interface based on LAN and the dataread and whte interface.3' Net cornmunication interface aPplies the C/S mode.Build the dataserver on the Operator Working Station and Offer the data read and wrte APIsbased on LAN.4' Establish the user authentication system and encryPt it during thetransfers of the process data within LAN in order to gUaranee the safety of thedat8.5' ImPlemellt the monitOr and cOfltrol syStem of the MI-90 DiSttiblltedControl System based on browsers and the data read and write interface.6' The monitor and control system aPplies the more advanced B/Smode.Actrual works are setting up the Intrdriet,establishing WEB. FTP and DNSservers,and the like,mainly developing the WEB server and the database serverbased on the Intranet.The net communication interface parts of the article are writed into theCIMS subect product in the 863 automation domain:.