01EtherNetIP.docx

01EtherNetIP.docx

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01EtherNetIP

EtherNet/IPTheWayForward

ControlNet–HighPerformance&HighAvailability

NetLinx–InformationEnabled4

AboutthisHandsonLab4

DocumentConventions4

EtherNet/IP–OpenIndustrialEthernet5

AboutthisHands-Onlab5

BeforeYouBegin6

LabMaterials6

Lab1:

EtherNet/IPterminologies（Presentation）7

AboutThisLab7

ConnectionOverview7

Terminology7

EtherNet/IPModulecapacity9

Lab2:

PredictSystemPerformance12

AboutThisLab12

SystemPredictionGoals12

Determinationofsystembandwidthrequirements13

NetLinx–InformationEnabled

AboutthisHandsonLab

ThissessionprovidesyouwithanopportunitytoexploretheEtherNet/IP,ControlNet,andDeviceNetplatforms.Thefollowingsectionsexplainwhatyou’llbedoinginthislabsession,andwhatyouwillneedtodotocompletethehands-onexercises.

WhatYouWillAccomplishInThisLab

Asyoucompletetheexercisesinthishands-onsession,youwill:

?

▪Understand&DesignaEtherNet/IPsystem

▪Understand&ConfigureControlNet&analyzetheperformance

▪Understand&ConfigureDeviceNetsystem

▪Configurebasicnetworksettings

DocumentConventions

Throughoutthisworkbook,wehaveusedthefollowingconventionstohelpguideyouthroughthelabmaterials.

Thisstyleorsymbol:

Indicates:

Wordsshowninbolditalics（e.g.,RSLogix5000orOK）

Anyitemorbuttonthatyoumustclickon,oramenunamefromwhichyoumustchooseanoptionorcommand.Thiswillbetheactualnameofanitemthatyouseeonyourscreenorinanexample.

WordsshowninCouriertext,enclosedinsinglequotes（e.g.,'Controller1'）

Anitemthatyoumusttypeinthespecifiedfield.Thisisinformationthatyoumustsupplybasedonyourapplication（e.g.,avariable）.

Note:

Whenyoutypethetextinthefield,rememberthatyoudonotneedtotypethequotes;simplytypethewordsthatarecontainedwithinthem（e.g.,Controller1）.

Tip

Thetextthatfollowsthissymbolissupplementalinformationregardingthelabmaterials,butnotinformationthatisrequiredreadinginorderforyoutocompletethelabexercises.Thetextthatfollowsthissymbolmayprovideyouwithhelpfulhintsthatcanmakeiteasierforyoutousethisproduct.

Note:

Ifthemousebuttonisnotspecifiedinthetext,youshouldclickontheleftmousebutton.

EtherNet/IP–OpenIndustrialEthernet

AboutthisHands-Onlab

InthislabyouwillbeprovidedwithanapplicationexampletoestimatetheperformanceofanEtherNet/IPcontrolsystem.ThislabdescribeshowtopredicttheperformanceofyourEtherNet/IP-basedcontrolsystemandhowtoenhancethatperformance.

WhatYouWillAccomplishInThisLab

Asyoucompletetheexercisesinthishands-onsession,youwill:

▪UnderstandEtherNet/IPterminologies

▪Predictanapplicationperformance

▪DesignconsiderationforanEtherNet/IPsystem

WhoShouldCompleteThisLab

Thishands-onlabisintendedfor:

▪Controlengineersorengineeringmanagementwhodesignorchoosenetworks

▪OEMswhodesignormanufacturecontrolsystems

▪Maintenanceandplantfloorpersonnelwhomaintainandtroubleshootsystems

▪AnyoneinterestedinlearningmoreaboutEtherNet/IP

BeforeYouBegin

BeforeyoubeginthisHands-OnLab,pleasebesuretocloseanyapplicationsthatarecurrentlyrunning.

LabMaterials

ForthisHands-Onlab,wehaveprovidedyouwiththefollowingmaterialsthatwillallowyoutocompletethelabsinthisworkbook.

Hardware

Thishands-onlabusesthefollowinghardware:

▪1796-CLXDemoBox

Software

Thishands-onlabusesthefollowingsoftware:

▪RSLinx

▪RSLogix5000

Files

Youdon’trequireanypreconfiguredfiles.

Lab1:

EtherNet/IPterminologies（Presentation）

AboutThisLab

ThislabdetailsterminologyrequiredtobeknownbeforedesigninganEtherNet/IPsystem.Inthislabyouwill:

▪ConnectionOverview

▪Terminologyusedinconnection

▪EtherNet/IPModulecapacitydetails

ConnectionOverview

Aconnectionisapoint-to-pointcommunicationmechanismusedtotransferdatabetweenatransmitterandareceiver.Connectionscanbelogicalorphysical.AnEtherNet/IPCIPconnectiontransfersdatafromanapplicationrunningononeend-nodetoanapplicationrunningonanotherend-node.ACIPconnectionisestablishedoveraTCPconnection.AsingleTCPconnectioncansupportmultipleCIPconnections.

Task1:

ALogixcontrollerhas5CIPI/Oconnectionstomodulesinremotechassisandalloftheseconnectionsarethroughthesamelocal1756-ENBTandthesameremote1756-ENBT.

Then,howmanyTCPconnectionswillexistandhowmanyCIPconnectionswillexit?

Task2:

ALogixcontrollerhasanRSLinxOPCClientlink.

Then,howmanyTCPconnectionswillexistandhowmanyCIPconnectionswillexit?

Note:

FillthedetailsintheAppendix

TCPconnectionsareusedforallcommunicationsonEtherNet/IP.Evenwithimplicitconnections,aTCPconnectionisusedandremainsopen.ATCPconnectionisrequiredforallCIPmessaging,includingconnectedandunconnectedmessaging.

CIPconnectionsarealmostalwaysused.UnconnectedCIPmessagesareusedbutaretemporary（shortlived）.

Terminology

Term

Definition

Implicitconnection

Implicitconnectionsaretimecriticalinnature.ThisincludesI/Oandproduced/consumedtags.Implicitreferstoinformation（sourceaddress,datatype,destinationaddress,etc.）whichisimpliedinthemessagebutnotcontainedinthemessage.

Explicitconnection

Explicitconnectionsarenon-timecriticalandarerequest/replyinnature.ExecutingaMSGinstructionorexecutingaprogramuploadareexamplesofexplicitconnections.Explicitreferstobasicinformation（sourceaddress,datatype,destinationaddress,etc.）thatisincludedineverymessage.

ProducerandConsumer

Producer/consumerreferstoimplicitconnections.Withimplicitconnections,messagesaresentcyclically（everyRPI）.

Example:

AssumeaControlLogixcontrolleriscontrollingasinglerackofFlexI/Ousingarackconnection.BoththeENBTmodulethatislocaltothecontrollerandtheFlexAENTmoduleareconsumersandproducersofdata.TheAENTconsumesoutputsandproducesinputs.

ClientandServer

Client/serverreferstoexplicitconnections.Aclientcreatesaconnectionandinitiatesmessages.Aserverprovidesaserviceordata.Clientscansendmessagescontinuouslyorintermittently.

Example:

AControlLogixcontrollercansendaMSGinstructiontoanothercontroller.

Transports

Eachconnectionhastransports.Atransportisauni-directionentitywithitsownnumericidentifier.Aimplicitconnectionhas2transports.Aexplicitconnectionhas1transport.TransportsareimportantbecausetheyhelpyoucalculatethenumberofpacketspersecondforeachEthernetinterface.

Example1:

ForanI/OconnectiontoarackofFlexI/O,aconnectionisconfiguredinRSLogix5000softwarebyaddingtheFlexadapterandI/OmodulesintheI/Olist.Whentheconnectioniscreated,outputpacketsflowfromthecontrollertotheI/Orack.Inaddition,inputpacketsflowfromtheI/Otothecontroller.Eachdirectionofflowisatransport.Inthisexample,twotransportsexist.Onetransportisfromthecontrollertotheadapter.Thesecondtransportisfromtheadaptertothecontroller.

Example2:

Foraproducedtagconnectionwith2consumers,thereisaconnectiontoeachconsumer.Datafromtheproducerisproducedtothewireononetransport.Eachoftheconsumersreturnsaheartbeat.Atotalof3transportsexistinthisexample.Onetransportisfromthetagproducingcontrollertothe“wire”media.Thesecondtransportisfromoneconsumertothetagproducer.Thethirdtransportisfromthesecondconsumer.

UCMM

Inthewebservers,youcanseereferencestoUnconnectedMessageManager（UCMM）.Thistypeofmessagingismomentaryandthereforecanbeignoredunlessyouaretroubleshooting.

ExamplesofwhereUCMMmessagesareusedare:

•Flashupdateofmodulefirmware

•SomefunctionsinRSLinx

•CIPGenericMSGinstruction

•OpeninganyCIPconnection（forward_opencommand）

EtherNet/IPModulecapacity

TCPConnections

TCPconnectionsarerequiredforEtherNet/IPcommunications.TCPconnectionsareusedforunconnectedCIPmessagesandforCIPexplicitconnections.

ExamplesofTCPconnectionsare:

•HMI（human-machineinterface）toacontrollerthatsupportsEtherNet/IPcommunications

•LogixMSGinstructiontoacontrollerorworkstation

•OPCorDDEaccessingacontroller

Product

TCPConnectionLimit

1756-EN2T

128TCPconnections.ThesemodulesalsohavewebserverswhichuseTCPconnectionsfornon-CIPtraffic（HTTP）.TheseTCPconnectionsdonotcounttowardthe128-connectionmaximum.

1756-ENBT

64TCPconnections.ThesemodulesalsohavewebserverswhichuseTCPconnectionsfornon-CIPtraffic（HTTP）.TheseTCPconnectionsdonotcounttowardthe64-connectionmaximum.

1756-ENET/B

1756-EWEB

1769-L32E

1769-L35E

1788-ENBT

1794-AENT

1734-AENT

AsmanyTCPconnectionsasmemoryisavailable.

CIPConnections

CIPconnectionsarerequiredforbothimplicitandexplicitmessaging.ExamplesoffunctionssupportedbyCIPconnectedmessaginginclude:

•LogixcontrollermessagetransfertoLogixcontroller

•I/Oorproducedtag

•Programupload

•RSLinxDDE/OPCclient

•PanelViewpollingofLogixcontroller

CIPConnectiontype

TCPConnectionLimit

BridgedConnection

AbridgedconnectionisaconnectionthatpassesthroughtheEtherNet/IPmodule.TheendpointoftheconnectionisamoduleotherthantheEtherNet/IPmodule.

Example:

anexplicitconnectionfromacontrollerthrougha1756-ENBTtoanothercontroller.

End-nodeConnection

Anend-nodeconnectionisaconnectionwhoseendpointistheEtherNet/IPmoduleitself.

Example:

anexplicitco