devicenet的故障排除

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1、DeviceNet的故障排除DeviceNetwillnotfunctioncorrectlyifdesignrulesarenotfollowed.DeviceNet的将无法正常工作，如果不遵循的设计规则。EvenaNetworkpreviouslythought即使是以前认为的网络tobefunctioningcorrectlymaybegintoexhibitabnormaloranomalousoperationduetoincorrectsystem要正确运作可能会开始表现出异常的运作不正常或因不正确的系统design.设计。Thefollowingaretipstohe

2、lplocateandcorrecttheseabnormalities.下面的提示，以帮助查找和纠正这些异常。ForspecificDeviceNetSystemInstallationInformation.对于特定的DeviceNet系统的安装信息。PleaserefertopublicationDN-6.7.2entitled请参见出版物的DN-6.7.2题为"DeviceNetPlanningandInstallationManual".“DeviceNet的规划和安装手册”。ManualscanbeorderedviatheAutomationBookstoreonth

3、eInternetat"手册可以下令在互联网上通过自动化书店“www.theautomationbookstore.com"oryourlocalAllen-Bradleydistributororsalesoffice.www.theautomationbookstore.com“或您当地的Allen-Bradley分销商或销售办事处。TerminationResistors:终端电阻：Aterminationresistorequalto121Ohms1%,1/4WmustbeattachedateachendoftheTrunkcable.终止121欧姆的电阻等于1％，碳膜必

4、须附加在每个月底的干线电缆。TheTheresistorsmustbeconnectedacrosstheBlue&WhitewiresoftheDeviceNetcable.电阻必须跨接电线的DeviceNet电缆的蓝与白。ResistorconnectioncanbeverifiedbydisconnectingDeviceNetpowerandmeasuringtheresistanceacross电阻连接可以验证DeviceNet电源断开，并通过测量电阻theCan_H&Can_Llines(Blue&WhiteWire).在Can_H＆Can_L线（蓝与白线）。Thisr

5、eadingshouldbeapproximately60Ohms.该读数应大约60欧姆。Important:TheDeviceNetnetworkwillnotoperatecorrectlywithoutterminatingResistors.重要事项：在DeviceNet网络不会正确操作电阻不终止。Termination终止resistorscanbeorderedfromyourlocalAllen-BradleyDistributorusingthepartnumber1485A-电阻可从网上订购当地的Allen-Bradley经销商使用零件编号1485A-C2.C2的

6、。Page2第2页NetworkGrounding:网络接地：TheDeviceNetcablemustbygroundedatonlyonelocation.在DeviceNet电缆必须接地的位置只有一个。Thisshouldbedoneclosesttothecenterofthe这应该是做最接近的中心network.网络。connectthenetworkShieldandDrainwiretoanearthgroundusing#8AWGwireuptoa连接网络屏蔽和排水管线到接地使用＃8AWG导线多达maximum3m(10Ft)inlength.Alsoconnect

7、theV-conductor(BlackWire)ofthenetworktrunkcableand最大3米）在length.Also（10英尺连接的V-导体的网络干线电缆（黑线）和theDCgroundofthepowersupplytothisgroundconnection.直流接地的接地连接的电源这一点。PowerSupplies:电源：DeviceNetrequires24VDC.DeviceNet的需要24V直流。Useapowersupplyrated2