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AutomaticControlApplicationsInthesociallife班级：学号：姓名：1/5ProgrammablecontrollertocontrolwatersupplysystemConstantpressurewatersupplysystemforacertainindustryoraparticularuserisveryimportant,forexampleincertainproductionprocesses,ifthetapwatersupplyorshort-timeshortagesduetoinsufficientwater,whichmayaffectproductquality,seriousproductscrapanddamagetotheequipment.Whenafireoccurs,ifthewaterpressureisinsufficientornowatersupply,norapidfire,canleadtosignificanteconomiclossesandcasualties.Sosomeofthewaterareawithconstantvoltagewatersupplysystem,hasgreateconomicandsocialsignificance.MechanicaltechnologyOldpressurizedequipment,Generalstartsorstopsusingconstant-pressurewatersupplypressurizingstationexitofpumpsandregulatingvalveopeningistobeachieved.Controlsystemistheuseofrelay-contactorcontrolcircuits,thislinecomplex,difficulttomaintain,andoperatetrouble,workerstoguardsonduty24hours,laborintensive.Itisnecessarytoreform,improvethelevelofautomation.ElectricaltechnologyPresentedtoatapwaterpressurestationquickstartingofconstantpressurewatersupplycontrolsystem,theFP3producedbyMatsushitaprogrammablelogiccontroller(PLC)controlswithAdvantechindustrialcomputermonitor,highdegreeofautomation,thewholeprogramtoworkautomatically,clearlyshowsthereal-timestatusofeachdevice,andautomaticallyadjustthewaterpressure.Thesystemalsohasawiderangeofprotection,suchaswaterpressurealarmfaultalarm,wateralarm,valves,pumpmotorcurrentflowandprocessingalarmprocessingandsoon.Systemstructureandcontrolrequirementsofmechanicalandelectricalengineeringtechnologynetwork，Constantpressurewatersupply2/5systemconsistsofthemainloop,thealternateloopofwatersupply,Composedof2watertankandpumphouse,asshowninFigure1.Pumpingstationequippedwitha1#~6#atotalof6setsof150kWpumps.Thereismorethanone(V1~V23)electricvalvecontrolsthewatercircuitandtheflowofwater.Requirestheconstantpressurewater-supplysystemhasthefollowingbasicoperatingfunctions.Electricaltechnicalmachinerytechnolog.Whenmunicipalwaterpressureishigherthanthesettingpressure21.56x104Pa,directlybythemunicipalwatersupplyinelectricaltechnology.Whencitywaterislowerthanthesetpressure,butunderthepressureofnotlessthan7.84x104Pawhenusingdirectpumpingpressurizedwatersupplysolutions.Ofprogressivelystarting2pumpstopipenetworkpressure.Whencitywaterhigherthanthesetpressureisdetected,thenconvertedtocitywatersupplydirectly.Whenthetapwaterpressureislowerthan2.94x104Pa,orwhenthereisanegativepressuresignalexactly,shouldimmediatelyconvertwaterpressure,butshouldensurethatthepoolwaterlevelabovetheminimumwaterlevelconditions.Mechanicaltechnology.Whenpumpingorpumpingwaterpressurewatersupplyisused,shouldbeabletoautomaticallyadjustthewaterpressureforagivenvalueofitstotalexports,controldeviationislessthanorequalto10%.ElectricaltechnologyCAD/CAMtechnologyDesignofPLCcontrolsystemCAD/CAMtechnologyConstantpressurewatersupplysystemfordetectionandcontrolofmoreisalargecontrolsystem.Accordingtoitscharacteristics,wehavechosenPanasonicFP3programmablecontrollerisacontroller.Thecontrollerwithitcanprogrammingsequencecontrollercomparedto,hassomeobviouslyofadvantages,asFP3usedhasmoduleofdesign,canaccordingtoactualneedsflexibleassembled,usingconvenient,I/O3/5distributionusedfreeprogrammingway;capacitybig,programvolumeonlybyscancyclelimit,andscancyclecaninmustrangewithinitselfchange;hasA/D,andD/A,andpulseoutput,andlocationcontrol,seniorunit,canachievedsharedmemory;additionalsosomespecialoffunction.MechanicaltechnologyConstantpressurewatersupplysystemofPLCsystemstructureisshowninFigure1-dashedborder.Industrialcomputertomonitortheentiresystem,thedisplayshowsthetotalpressurizedsystemstructure,readthereal-timestatusofeachvalveandpump,waterpressureandflowrate,thevalveopening,thepoolwaterlevelandotherparameters,andreal-timedisplayalarmandfaultrecord.ElectricaltechnologyBothanaloginputandswitchinput.Analogbya/dmoduleinput,total27channels.Thereare96I/Opoints.CAD/CAMtechnologyMechanicaltechnologyPLCsoftwaredesignElectricaltechnologyAccordingtoconstantpressurewatersupplysystemoperationalrequirements,PLCcontrolsystemtomonitorCitytapwater,andwaterhastodecidewhethertostartthewaterpump,ordirectwaterpumpingprogrammeorbypumpingpressurizedwaterfullsolution.Controlsystemtheprocedureismorecomplex.Electrical/mechanicalengineeringtechnologynetworkInthecontrolprocess,watersupplyandpressureregulationisanimportantandoneofthemoredistinctivedesign,focusingonsoftwaredesignofautomaticconstant-pressurefunction.Duetothelargewatersystempipinglengthanddiameter,theopeningandclosingofthevalve,pipenetworkpressureisslow,sothesystemisasystemwithlargetime4/5delay.Andbecauseitisbasedontheoldequipmenttransformation,tomakeuseofexistingequipment,itdoesnotusespeedregulator,insteadofusingthevariousmethodstoadjustthewaterpressure.Firstusedsegmentregulationmethod,puthydraulicdeviationisdividedintofoursegment,that10%,and20%,and30%,and40%,dangdetectiontodeviationsmallerShi,outputofcontrolvolume(butterflyvalveofincremental)smaller,andoperationcyclealsolarger;Inaddition,whenthedeviationislessthanorequalto±10