plc方面的资料中文翻译成中文，谢谢

Today,programmablecontroller(PLC)hasbeeninallwalksoflifeawiderangeofapplicationsanddevelopment,andSiemensseriesofPLCinPLCfieldinawiderangeofapplications.ThispapermainlyintroducedPLCinonsomeoftheengineeringapplication,advantagesanddevelopmentstatusandprospect.IntroducesSiemensPLCcommonlyusedsomeproductsseriesclassificationandprofibus-dpcommunicationprotocolandEM277module.STEP7usedtostudytheS7-300hardwareconfiguration,SiemensS7-200andSiemensS7-300throughtheEM277profibus-dpcommunicationrealized.Introducesprofibus-dpintheapplicationofdrawingtechnology.