:100225855(2006)0520024204:(1962-),,,,PLC,,,(,730050)CPM2A-60CDT-DPLC(),PLC;;;:TG43411:BDevelopmentofPLCsysteminprocesscontrollingplasmatransferredarcCHENKe-xuan,LIUGuo-qing,LIChun-xu,CAIXiu-peng(LanzhouUniv.ofTech.,Lanzhou730050,China)Abstract:ThispaperintroducestheautomatictracingequipmentofPTA(plasmatransferredarc)appliedintripleeccentricbutterflyvalve.ItscontrolsystemisdesignedonthebasisofPLC(Pro2grammableLogicalController)whosemodelisCPM2A-60CDT-D.PLCrealizesthefunctionsofPTAcraftworkandreal-timetracingworkpiece.Thehardwarerealizationandsoftwaredesignofwholecontrolsystemareanalyzed.Keywords:PLC;PTA;automatictracing;tripleeccentricbutterflyvalve1,1,,,,,,,PLC,,,2,PLC3(1)1121314151617181911011111211,,,,4220065©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2)2,,,,4PLCPLCI/O,,,,,PLC,,PLC,4411OMRONCPM2A-60CDT-DPLC,CPM1A-MAD01PLC,PLC,,(3)3412PLCI/OCPM2A-60CDT-DI/O60,36,24IR0000IR0011IR0100IR0111IR0200IR0211,36IR0000IR0003,IR0006IR00075,,,PLC,IR0004IR0005,16IR1000IR1007,5220065©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(0,a0=0),,01,s1=a1-a0=a112,s2=a2-s123,s3=a3-s2-s1,n-1nsn=an-sn-1-sn-2--s2-s1=an-n-1i=1si,,5566220065©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(D507Mo),1012mm,135143A,3038A,01050106r/s(),59V()41V(),0138014m3/h,0105012m3/h,0110125m3/h,715mm,115116Hz,==1192s20mm,315mm,,X,6PLC,,,,,,1,.M.:,1979.2.J.,2001,(1):20-25.3,.D.,2000.4.PLCM.:,2004.5,.M.:,2000.6,,.J.,2003,39(12):80-84.(:2006107107)(23)(,(420mA015),,3(1)311(1):D-30BGD:115230V,0145A:24V,1A(2):USB-1:020mAA/D:12bit:RS232:9600bps312114,,1GB/T13927-1992,S.(:2006105108)7220065©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.