1TheapplicationofPLCtechniqueinthecontrolofmarineboilersProgrammableforewordcontroller,IscalledPCorPLC,ItappearscausesthecontroldomainfacedwithatechnicaltransformationTaketherelayasthefoundationengineroomcontroldevicestructurecomplex,thecomponentaremany,Thereliabilityisbad,ThebreakdownsometimesoccursThecurrentourcountryshipsusetheimportcompletesetcontroldevice,Itsfunctionconsummates,Thereliabilityisalsohigh,ButthepriceisexpensiveNumberyearago,IuseimportPLCamthecontroller,Owndesignthehardware,Establishmentcontrolprocedure,DevelopssuccessfullythePC-GCprogrammableboilercombustioncontrolinstallment,SubstitutesfortheEnglishHAMWORTHYCorporationproductInthenearfuturethesimilarproductwillcomparewiththiscompany,Performancequite,Thepriceonlyisits12.513.4year,AltogetherhasPC-GCtoinstall12setsinDazing414andsoon6Stripoiltankersolidshipuse,ExperiencestheSouthChinaSeastormandthenearly70hightemperatureadversecircumstancetests,Movesgood,DoesnothaveabreakdownTheexperienceindicated,Introducestheminorityessentialcomponent,Accordingtoconcretecontrolsystemrequest,Designstheappropriatesoftwareandthenecessaryhardware,Istheshipstechnologicaltransformationsandtheequipmentdispositiongoodmeans1systemcompositionThesystemiscomposedbybelowseveralparts:ProgrammableforewordcontrollerPC；PowersourcePS；ExaminationunitCooperationunitOB；ActuationunitM；DisplaymonitorIB；AuxiliaryrelayunitJB；LinebankL,Likechart1showsThefirstsixpartsarethecontroldevicebasiccompositionThisinstallmentadditionallybuildsauxiliaryrelayunitJBincludingfour8portsintermediaterelayJ1,J2,J3andJ4and12portslightcontrolsrelayJGC.Whenthecontrolleroutputmustactuatethehigh-powerload,NeedstocarryonthevoltageorthepowerconversionthroughtheintermediaterelayTheintermediaterelaybesidescompletesthehostwhichitundertakestocontrolthefunction,Alsoprovidesmanyvice-auxiliaryports,Mayusefortheinterconnectionrelatedequipmentorputthroughtheconditionindicatinglamp,DoesthismaysavethehosttocontroltheunitthehardwareresourcesAfterestablishmentlinebank,Thepowersource,thePCboard,examinethecomponent,carriesoutthecomponent,operatesthebutton,thedisplaylampandsoonthecompletecontactalllinkstothelinebankplugin,Thisfortheequipmentsetup,theserviceandthesearchbreakdownhasprovidedtheconvenienceSystemeachpart2ofcompositionsandconnection。2Systemscontrolsrequest2.1Burningmanagementcontrol(1)FueloilchoiceThefuelmaychoosetheheavyoilorthelightoilIfchoiceheavyoil,Theoiltemperaturemustin80above,ThesidecancarryonburningTheoiltemperatureislowerthan80,Thenblowing-out,Andthestartheatsuptheinstallmenttoheatuptotheheavyoil(2)CombustioncontrolAccordingtothestart,frontsweepsthegas,theignition,opensthe#1sprayhole,opensthe#2sprayholetheordertostartboilerburning；Afterclosesthe#2sprayhole,closestheorderblowing-outwhichthe#1sprayhole,sweepswasmad(3)SteampressureintermittentcontrolAccordingtoboilersteampressurepANDgatelimitingvaluep1(0.7MPa,p2(approximately0.6MPa)controlstwosprayholesapproximately)theworkWhenpp1,#1,the#2sprayholecloses；Whenp1pp2,The#1sprayholealoneworks；Whenp2p,#1,the#2sprayholeopens。(4)Boilerwatermonitortheboilerwaterlevelusesthepairofpositioncontrolmode,whichknewverywell,Therefore,doesnotgiverelatesindetail2.2Interconnectionprotections(1)SteamoverpressureinterconnectionThesteampressurearrivesreportstothepolicethresholdvaluep0(approximatelytime0.72MPa),Sendsoutthesteamoverpressurethewarning,Blowing-out,Andshutsofftheloadpowersource,Stopstoallexecutionscomponentpowersupply(2)TheboilerwaterlevelreportstothepoliceTheestablishmenthighreportstothepolicethewaterlevelandthelowestdangerwarningwaterlevelWhencontrolsmalfunctions,Thewaterlevelsurpassesreportstothepolicethewaterlevel,Thensendsoutthehighwatermarktoreporttothepolice,AndshutsoffthefeedpumpelectricmotorpowersourceWhenthewaterlevelislowerthanthedangerwarningwaterlevel,Thensendsoutthelowwaterleveltoreporttothepolice,Boilerblowing-out。(3)Theemergencyblowing-outprotectsWhenthecollectioncontrolsTaiwantohavetheblowing-outtoorder,Thensendsouttheemergencyblowing-outthewarning,Boilerblowing-out(4)HeavyoiltemperaturecontrolinterconnectionWhenchoiceheavyoil,Theoiltemperatureishigherthan80procedurestobeabletomoveTheoiltemperature3lowlyislowerthanthisvalue,Sendsoutthewarning,Boilerblowing-out(5)FlamesurveillanceunusualinterconnectionWhenappearstheignitiondefeat,themidwayflameoutortheburningconditionworsening,Sendsouttheflamesurveillancetobeunusualthewarning,Boilerblowing-out(6)Manual,automaticoperationinterconnectiononlywhencutstheswitchtosetmanually(isautomatic)theposition,onlythenallowscarriesonmanually(isautomatic)alloperations(7)The#1sprayholedoesnotwork,Ortheairthrottlehasnotstartedinabigway,The#2sprayholedoesnotworkandsoon3HardwaredesignsThehardwaredesignmainlyrevolvesthesystemthereliabilityandtheconsummationitsfunctiontwogoalcarrieson3.1PCshapingTheprogrammableforewordcontrolleruses,theexcellentcraftmanufactureadvanced,itsreliabilityisthegenerallaborcontrolsthemicrocomputer46todouble,ThereforeshouldstressfromthecontrolfunctionanglechoosesPC.Regardingthesingleplane,themediumscale,useinguaranteeingtheboilersafeoperationtheautomaticcontrolsystem,Toconservesenergythegoaltobepossiblenottoconsider,ThereforedoesnotneedthePIDcontrolfunctionSuchsystembyconditioncontrol,sequentialcontrolprimarily,Bytheswitchquantitylogicoperation,thetime,countsisinthemajority,Toaspecttheandsooncomponentrunningrateperformancedoesnothavethespecialrequest,Thereforemayactaccordingtotheproceduretoneedthecapacity(IOportnumberandmemorysize)makesthePCshapingThestoragecapacity(procedurestep)may)*(IO)maketheestimateaccordingtoempiricalformulaQ=610,Iftheuserprogramisnotbig,SavesTheaccumulatorcapacitydemandiseasytosatisfyThissystemaltogethermustinputtheport,outputporteach14(ifincreaseboilerwatermonitorfunction,Mustagainincreasetheinput,outputporteach4),ThereforeusesMitsubishiCorporationF1-30MRorF1-40MRisthecontrollerF1-30MRisthesubminiatureprogrammableforewordcontroller,Itsinput,outputstheportwithPCmachinetoassembleintogether,DoesnotneedtochoosetheIOmoduleagainF1seriesPCdoesnothavebreakdowntimeintervalMTBFis300,000hours,Themutable(0+55,Work；-15+65,Stock),Bearsthevibration,theimpact(conformstoJISC0911,theC0912standard),Adoptsthepowersourceprotection,thesupplyvoltagesurveillance,theinstantaneouspowercut4compensates,measureandsoonanti-leveldisturbance,ThereliabilityandtheantjammingabilityareveryhighItalsohasmakesamistakefromthediagnosisability,Includingcirculartelegramdiagnosis,proceduremonitoringdevice(Watchdog)andEOL,MayguaranteethecorrespondenceandtheprocedureexecutionaccuracyF1-30MRhasinputport16,Outputsport14,CansatisfytheprocedureexactlytheneedWhentheexpansionprocedurefunctionalneedincreasestheIOport,Maythroughaffixtheexpansionlist3.2PowersourcesprotectionsandantjammingAlthoughPChasthegoodpowersourceadaptiveness,Alsoshouldtakethemeasurefromtheelectricalpowersystem,Reducesintheinstallmentpowersupplyasfaraspossiblethedisturbance,theundulation,owespresses,theinstantaneoushighpressuretothesystemtheinfluenceTherefore,UsesintheelectricalpowersystemSeparationpowersourcepowersupply,insulatingtransformerandpowerfailureprotectorPCmachine,theinputcircuitandtheoutputcircuitbyseparatethepowersource,throughtheinsulatingtransformerpowersupplyInsulatingtransformershieldlevelgoodearth,ThesecondaryoutputusesthetwistedpairlineThesemeasuresregardingsuppressintheelectricalnetworkandmixintheinputoutputcircuitthedisturbancetocausetheproceduredisoperationtohavethegoodeffectTheinsulatingtransformerusesthehighqualityhighmagnetic-fluxdensitynottohavecutsthecircularcross-sectioncore,Losesslightly,Enabletheequipmentanti-voltageundulationtheabilitytoobtaintheenhancementFr