ESDApplicationofEmergencyShutdownSytemESDinHydrogenCrackingPlant12115106412525000ESDTRICONTRICONTRICONESDTRICONAbstractToagainsttheproblemsinexistingESDsystemofhydrogencrackingplantinMaoMingPetrochemicalstheretrofitwithTRICONsystemisimplemented.ThehardwareconfigurationofTRICONsystemlogicprogrammingtheman-machineinterfaceandthesystemcommissioningareintro-ducedemphatically.ThepracticalapplicationshowsthattheTRICONsystemovercomevariousdisadvantagesintheoldsystemandensuredsafetyproduc-tionoftheplant.KeywordsHydrogencrackingplantEmergencyshutdownsystemESDTRICONsystemTriple-modularredundant0ESDemergencyshutdowndeviceSOEsequenceofeventTRICONEXTRICON4ESD5171TRICONTRICONTMRthreemod-uleredund3TaVAK6TRICON33333/TRICONLEDDCSTRICONSOETRICONEX4526520055PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.5May2005Tristation1131SOEDDE3WONDERWAREINTOUCH2ESD2.1TRICONSOE11TRICONTristation1131CPUI/OI/OHUBHUBSOESOE2.2ESDESDTRICONTrista-tion1131CPUI/OI/O①②I/OI/O32ESDI/OINTOUCHDDEI/OTAGNAME2.3SOETRICONST3ESDESDSOESOESOESOEESDSOETRICON1131TRICONSOESOE2.4C101C101①②③④⑤⑥⑦⑧C101⑨⑩21/○117/C101XCV101C10122C1012.555ESDIntouchIntouchWonderwareWindowsIntouchWindowsMakerWin-dowsviewerWindowsMakerWindowsviewerESDESDESDESDDCSESDESDIN-TOUCH3ESDSOETristation1131SOE4TRICON20045①ESDDCSDCSESD②ESD③④I/OESDDCSESDSOETRICONESD5ESDESDESDESD1TRICONEXTRICONTechnicalproductGuide19942WonderwareWonderwareInTouch7.1120002004-12-221967199020046526520055PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.5May2005