Beckhoff CX2100­09x4 Bedienungsanleitung Seite 20

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Seitenansicht 19
Productoverview
Sothattheparameterscanbeviewedandchangedinadvancewithoutthepresenceofaslave,adefault
copyoftheentiredirectoryisusuallystoredinthedevicedescriptionfileESI(XML).Thisiscalledtheoffline
directory.ChangesinthisdirectorydonotaffectthelateroperationoftheslavewithTwinCAT.Thexmlfiles
canbeobtainedfromtheBeckhoffwebsiteintheDownload area.
TheTwinCATsystemmanager2.11candisplaybothlistsandmarksthis:
intheonlinedirectory intheofflinedirectory
theactualcurrentslavelistisread.Thismaytake
severalseconds,dependingonthesizeandcycle
time
theofflinelistfromtheESIfileisdisplayed.Inthis
casemodificationsarenotmeaningfulorpossible.
theactualidentityisdisplayed theconfiguredstatusisshownunderIdentity
thefirmwareandhardwareversionoftheequipment
accordingtotheelectronicinformationisdisplayed
nofirmwareorhardwareversionisdisplayed,since
thesearefeaturesofthephysicaldevice
agreenonlineisvisibleintheTwinCATSystem
Manager,CoEOnlinetab
aredofflineisvisibleintheTwinCATSystem
Manager,CoEOnlinetab
Classification
DifferentCoEparametertypesarepossible,includingstring(text),integernumbers,Booleanvaluesorlarger
bytefields.Theycanbeusedtodescribeawiderangeoffeatures.Examplesofsuchparametersinclude
manufacturerID,serialnumber,processdatasettings,devicename,calibrationvaluesforanalog
measurementorpasswords.
TherangesintheSlaveCoEthatareimportantfortheapplicationorientedEtherCATfieldbususerare
x1000:Thisiswherefixedidentityinformationforthedeviceisstored,includingname,manufacturer,
serialnumberetc.,plusinformationaboutthecurrentandavailableprocessdataconfigurations.
x8000:Thisiswheretheoperationalandfunctionalparametersforallchannelsarestored,suchas
filtersettingsoroutputfrequency.
Thefollowingrangesarealsoofinterest
x4000:InsomeEtherCATdevicesthechannelparametersarestoredhere(asanalternativetothe
x8000range).
x6000:InputPDOs("input"fromtheperspectiveoftheEtherCATmaster)
x7000:OutputPDOs("output"fromtheperspectiveoftheEtherCATmaster)
Channelbasedorder
TheCoEdirectoryislocatedinEtherCATdevicesthatusuallyencompassseveralfunctionallyequivalent
channels.e.g.a4channel0–10Vanaloginputterminalalsohas4logicalchannelsandthus4identical
setsofparameterdataforthechannels.Inordertoavoidhavingtolisteachchannelinthedocumentation,
theplaceholder"n"tendstobeusedfortheindividualchannelnumbers.
IntheCoEsystem16indices,eachwith255subindices,aregenerallysufficientforrepresentingallchannel
parameters.Thechannelbasedorderisthereforearrangedin16
dec
/10
hex
steps.Theparameterrangex8000
exemplifiesthis:
Channel0:parameterrangex8000:00...x800F:255
Channel1:parameterrangex8010:00...x801F:255
Channel2:parameterrangex8020:00...x802F:255
tbc...
Thisisgenerallywrittenasx80n0.
CoEdirectory–changesofvalue
Severalparameters,inparticularthesettingparametersoftheslave,arevariableandcanbewrittenbythe
userfromthefieldbusside.Thiscanbedoneinwriteorreadmode
CX210009x420 Version1.1
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