ancyandsuperiorcomputerredundancy.Therearetwosuperiorcomputersinthesystem,primarystationandsecondarystation.Innormalconditions,onlytheprimarystationcommunicateswithPLCandthedatainthesecondarystationsynchronizewiththeprimarystationtomakeabackup.Iftheprimarystationfails,thesecondarytakesoverthejob.AndthejobrdInternationalConferenceonPowerElectronicsSystemsandApplicationsDigitalReference:Kcouldcomebacktotheprimarystationormanuallyaftertheprimarystationreturnsnormal.ForceControlsupportsPLCredundancyandnormallycommunicationswiththemasterstationofthePLC.IfthemastersystemofPLCisintheeventoffailure,thecontroljobwouldbetakenoverbythereservesystem,ForceControlwoulddisconnectthecommunicationaccordingtotheswitchflagandturntothereservestationtoexchangedates.B.HardwareDesignofPLCSystemBeforeselectingPLCmodules,analyzethecontrolledobjecttocountoutI/Opoints.Thecurrentrequirementand-margi器,然后控制阀门。
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