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IEEETRANSACTIONSONNUCLEARSCIENCE,VOL51,NO3,JUNE2004489MEASUREMENTOFREALTIMEASPECTSOFSIMATICPLCOPERATIONINTHECONTEXTOFPHYSICSEXPERIMENTSHARALDKLEINES,JANOSSARKADI,FRANKSUXDORF,ANDKLAUSZWOLLABSTRACTTODAY,MOSTSLOWCONTROLSYSTEMSFORPHYSICSEXPERIMENTSATFORSCHUNGSZENTRUMJLICHAREIMPLEMENTEDWITHPROGRAMMABLELOGICCONTROLLERPLCTECHNOLOGYANDFIELDBUSSYSTEMSINMANYCASES,EVENDETERMINISTICRESPONSEISREQUIREDFROMTHEPLCSTHISRAISESTHEQUESTIONABOUTTHEREALTIMEPERFORMANCETHATCANBEEXPECTEDFROMAPLCRESPONSETIMEMEASUREMENTSOFSIMATICPLCSMANUFACTUREDBYTHEWORLDMARKETLEADERSIEMENSAREPRESENTEDINFLUENCEOFPROGRAMSTRUCTUREANDHARDWARECONFIGURATIONONPERFORMANCEANDDETERMINISTICBEHAVIOROFAPLCISDISCUSSEDIPROGRAMMABLELOGICCONTROLLERSPLCSINEXPERIMENTCONTROLSYSTEMSTODAY,INDUSTRIALAUTOMATIONTECHNOLOGYISWELLESTABLISHEDININFRASTRUCTURESYSTEMSFORPHYSICSEXPERIMENTS,EG,INWATERORGASSUPPLYSYSTEMSTHISLEADSTOTHEHEAVYUSEOFPROGRAMMABLELOGICCONTROLLERSPLCS,WHICHTYPICALLYARETHEINTELLIGENTAUTOMATIONSTATIONSFORMINGTHECOREOFINDUSTRIALSYSTEMS1MAIN
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