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Schneider Automation Interbus Fiber Optic CommunicationsAdapter Manual de usuario Pagina 23

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CommunicationsAdapterRegisterMapping
20
20
3.2 Mapping DataBitstoI/OBaseTerminals
3.2.1 DataRegister Mapping forDiscrete I/Obases
ThedatatransmittedtoorfromtheI/Obasearetransferred1:1from/tothe
communicationadapter.
DataincontrollerregistersismappedtothefieldterminalsofdiscreteI/Obasesin
thefollowingway:
H Mappingisdonebywords(max.2for32I’sorO’s).
H TheMostSignificantWord(MSW)isalwayssentorreceivedfirst.
H ThewordssentbythecommunicationsadaptertotheI/Obaserepresentthe
outputs(Output-words).
H
ThewordssentfromtheI/Obasetothecommunicationsadapterrepresent
theinputs(Input-words).
DatamappingfortwodiscreteI/Obasesisshownasanexample:
I/OMapping ofthe170ADI35000(32Inputs) and170ADO35000
(32Outputs)
InputDatafrom170ADI35000
MSW=Word2
Inputs17...32
LSW=Word1 Inputs1...16
Output Datato170ADI35000
MSW=Word2
Outputs17...32
LSW=Word1 Outputs1...16
Additional documentation: RefertotheI/ObasesUserManual (870USE002
00)forfurther information.
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