关于PLC外文文献翻译.docx
- 文档编号:1313751
- 上传时间:2022-10-20
- 格式:DOCX
- 页数:16
- 大小:141.14KB
关于PLC外文文献翻译.docx
《关于PLC外文文献翻译.docx》由会员分享,可在线阅读,更多相关《关于PLC外文文献翻译.docx(16页珍藏版)》请在冰豆网上搜索。
关于PLC外文文献翻译
外文文献翻译
2014年6月
UnderstandingtheBasicsofS7—200NetworkCommunications
SelectingtheCommunicationInterfaceforYourNetwork
TheS7-200isdesignedtosolveyourcommunicationsandnetworkingneedsbysupportingnotonlythesimplestofnetworksbutalsosupportingmorecomplexnetworks。
TheS7—200alsoprovidestoolsthatallowyoutocommunicatewithotherdevices,suchasprintersandweighscaleswhichusetheirowncommunicationsprotocols。
TheS7-200supportsmanydifferenttypesofcommunicationnetworks。
TheselectionofanetworkisperformedwithintheSetPG/PCInterfacepropertydialog。
AselectednetworkisreferredtoasanInterface。
Thedifferenttypesofinterfacesavailabletoaccessthesecommunicationnetworksare:
1。
PPIMulti-Mastercables
2.CPcommunicationcards
3。
Ethernetcommunicationcards
ToselectthecommunicationinterfaceforSTEP7-—Micro/WIN,youperformthefollowingsteps.SeeFigure7-1.
1。
Double-clicktheiconintheCommunicationsSetupwindow.
2.Selecttheinterfaceparameterfo
Figure7-1STEP7—-Micro/WINCommunicationsInterface
PPIMulti—MasterCables
TheS7—200supportscommunicationthroughtwodifferenttypesofPPIMulti-Mastercables.ThesecabletypespermitcommunicationthrougheitheranRS—232oraUSBinterface.
AsshowninFigure7—2,selectingthePPIMulti—Mastercabletypeissimple。
Youperformthefollowingsteps:
1.ClickthePropertiesbuttonontheSetPG/PCInterfacepropertypage.
2.ClicktheLocalConnectiontabonthePropertiespage.
3.SelecttheUSBorthedesiredCOMport
Figure7-2PPIMulti—MasterCableSelection
Tip
PleasenotethatonlyoneUSBcablecanbeusedatatime.
Tip
ExamplesinthismanualusetheRS—232/PPIMulti-Mastercable.TheRS-232/PPIMulti-MastercablereplacesthepreviousPC/PPIcable.AUSB/PPIMulti—Mastercableisalsoavailable。
RefertoAppendixEforordernumbers.
UsingMasterandSlaveDevicesonaPROFIBUSNetwork
TheS7—200supportsamaster-slavenetworkandcanfunctionaseitheramasteroraslaveinaPROFIBUSnetwork,whileSTEP7-—Micro/WINisalwaysamaster.
Masters
Adevicethatisamasteronanetworkcaninitiatearequesttoanotherdeviceonthenetwork.Amastercanalsorespondtorequestsfromothermastersonthenetwork。
TypicalmasterdevicesincludeSTEP7——Micro/WIN,human-machineinterfacedevicessuchasaTD200,andS7-300orS7-400PLCs。
TheS7-200functionsasamasterwhenitisrequestinginformationfromanotherS7-200(peer-to-peercommunications)。
Tip
ATP070willnotworkonanetworkwithanothermasterdevice。
Slaves
Adevicethatisconfiguredasaslavecanonlyrespondtorequestsfromamasterdevice;aslaveneverinitiatesarequest.Formostnetworks,theS7-200functionsasaslave。
Asaslavedevice,theS7-200respondstorequestsfromanetworkmasterdevice,suchasanoperatorpanelorSTEP7——Micro/WIN.
SettingtheBaudRateandNetworkAddress
Thespeedthatdataistransmittedacrossthenetworkisthebaudrate,whichistypicallymeasuredinunitsofkilobaud(kbaud)ormegabaud(Mbaud)。
Thebaudratemeasureshowmuchdatacanbetransmittedwithinagivenamountoftime。
Forexample,abaudrateof19。
2kbauddescribesatransmissionrateof19,200bitspersecond。
Everydevicethatcommunicatesoveragivennetworkmustbeconfiguredtotransmitdataatthesamebaudrate.Therefore,thefastestbaudrateforthenetworkisdeterminedbytheslowestdeviceconnectedtothenetwork.Table7—1liststhebaudratessupportedbytheS7-200.
Table7-1BaudRatesSupportedbytheS7-200
Network
BaudRate
StandardNetwork
9.6kbaudto187。
5kbaud
UsinganEM277
9.6kbaudto12Mbaud
FreeportMode
1200baudto115.2kbaud
Thenetworkaddressisauniquenumberthatyouassigntoeachdeviceonthenetwork.Theuniquenetworkaddressensuresthatthedataistransferredtoorretrievedfromthecorrectdevice。
TheS7-200supportsnetworkaddressesfrom0to126。
ForanS7-200withtwoports,eachporthasanetworkaddress.Table7-2liststhedefault(factory)settingsfortheS7—200devices.
Table7-2DefaultAddressesforS7-200Devices
S7-200Device
DefaultAddress
STEP7--Micro/WIN
0
HMI(TD200,TP,orOP)
1
S7-200CPU
2
SettingtheBaudRateandNetworkAddressforSTEP7—-Micro/WIN
YoumustconfigurethebaudrateandnetworkaddressforSTEP7-—Micro/WIN。
Thebaudratemustbethesameastheotherdevicesonthenetwork,andthenetworkaddressmustbeunique.
Typically,youdonotchangethenetworkaddress(0)forSTEP7—-Micro/WIN.Ifyournetworkincludesanotherprogrammingpackage,youmightneedtochangethenetworkaddressforSTEP7—-Micro/WIN。
AsshowninFigure7—3,configuringthebaudrateandnetworkaddressforSTEP7——Micro/WINissimple.AfteryouclicktheCommunicationsiconintheNavigationbar,youperformthefollowingsteps:
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 关于 PLC 外文 文献 翻译