如何通过以太网实现PC对PLC的编程.doc

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1、QUESTION: WhatpossibilitesaretheretoconnectonlineaPG/PCtoaS7controlviaEthernet?ANSWER: WhensettingupanonlineconnectionbetweenaPG/PCandaS7controlviaindustrialEthernettherearesomeaspectstokeepinmind.FirstlyinNetProaPG/PCmustbeinsertedthatistoshowthelogicalconn

2、ectionofyourPG/PCstotheEthernetbus.Fig.1:InsertingaPG/PCinNetProInpropertiesdialogyouconnectthePG/PCviatheinterfaceEthernettotheEthernetbusandassigningaIPaddress,whichisunambiguoustothenetwork,tothePG/PC.Note:IPaddressesofthePG/PCsandS7controlsinNetPromustli

3、einthesamerangeofIPaddresses!Fig.2:ConfigurationinNetProTheIPaddressthatissetinMicrosoftWindows'controlpanelneednotmatchtheIPaddressconfiguredinNetPro!PleasemindthefollowingthreeaspectswhenassigningWindowsIPaddress:1.InWindowssettings(Start>Controlpanel>Netw

4、orkConnections>Properties>Internetprotocol(TCP/IP)>Properties)ofthePG/PCsthesameoranIPaddressofthesamesubnetisset.Fig.3:MicrosoftWindowsSettingsPossibleIPAddressesforthePG/PC:S7ControlPG/PC192.80.30.1192.80.30.4-192.80.30.254192.80.30.3192.80.30.2Table1:Poss

5、ibleIPAddressesofthePGFig.4:PossibleConfiguration2.TheWindowsIPaddress (Start>ControlPanel>NetworkConnections>Properties>Internetprotocol(TCP/IP)>Properties)ofthePClieinadifferentsubnetthantheIPaddressconfiguredinNetPro.Fig.5:MicrosoftWindowsSettingsInthisca

6、seanonlineconnectionbetweenthecontrolandthePGcanonlybeimplementedviaanIProuter.TheIProutercanexchangedatapackagesbetweendifferentIPsubnetworksbymeansofaroutingtable.IntheroutingtableIPaddressesandsubnetmaskofthecontrolandofthePGmustbeenteredinordertohavetheo

7、nlineconnectionsetup.Fig.6:ConnectionviaIPRouter3.TheWindowsIPaddressisreceivedautomaticallyviaaDHCPserver.Fig.7:WindowsSettingsTheIPaddresscanalsobereceivedautomaticallyviaDHCP,iftheassignedIPaddressalreadycompliestotheabovedescribedrulesinpoint1andpoint2.N

8、ote:Youcantestwithcommandping,ifaconnectionEthernetcanbesetupbetweenthePCandtheS7controlortheCP343-1/CP443-1.·ForthisopenaMSDOSprompt("Start>Run>cmd").·Type"ping"andtheIPaddressoftheS7control-e.