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1、InternationalCarpathianControlConferenceICCC’2002MALENOVICE,CZECHREPUBLICMay27-30,2002THENETWORKMONITORINGANDCONTROLSYSTEMFORTECHNOLOGICALPROCESSESBASEDONOSLINUX12MiroslavMATÝSEKandMilanADÁMEKInstituteofInformationTechnologies,TomasBataUniversityinZlin,FacultyofTech
2、nology,Zlin,CzechRepublic1matysek@ft.utb.cz2adamek@ft.utb.czAbstract:Thearticledealswithamonitoringandcontrollingsystembasedontheclient-serverarchitectureandcommunicatinginframesofTCP/IPcommunicationprotocol.Thatsystemisappliedformonitoringandcontrollingofrealtechno
3、logicalprocesseslikefermentationtemperatureinlocaldimensionareawithoutdirectconnectingpossibilities.Thedesignedstructureanditsrealisationhasbeenprovedinarealexperimentwithchromiumtannedleatherrestsrecyclingprocess.Keywords:Monitoringandcontrollingsystem,technologica
4、lprocess,computernetwork,Linux,TCP/IPprotocol.1IntroductionThegoalofthisworkistocreatemonitoringsystemscapabletosense,collectanddistributedatarelevanttotheparticulartechnologicalprocess.Whenwedidjudgethemostefficientstructureofthesystem,theclient-serverarchitectures
5、eemedtobethebestvariant.Itfulfilstherequirementsontheseparatedsensing,collection,distributionthepresentationofdata.Thebasicdivisionwehavemadedelegatesthesensingtothefirstclient,datacollectionanddistributiontoserverandpresentationtothesecondclient.Thatensurestheneces
6、saryfreedomfortheenvironmentselectionforanyofthepartsmentionedabove.Anotherdecisionmakingconcernsthechoiceofproperoperatingsystemsfortheserverapplication.Therelevantcriteriawere:•simultaneousexecutingofseveralprograms•supportofcommunicationamongprocessors•networkcom
7、municationmeansbasedontheTPC/IPprotocol•adequatehardwaredemands727Theunderlyingcriterionwasthecomplexfulfilmentwithoneoperatingsystem.AfterexcludingDOSandthesuperstructureWindows3.x,onlyOS/2,LinuxandWindowsNTwerehotcandidatesforselection(Tanenbaum,1992).2Themonitori
8、ngandcontrollingsystemmodelThefunctionofparticularmodulesisasfollows(seeFigure1):Datasensingisperformedbythefirstclientprogramtitled„recor
