
CommunicationsAdapterRegisterMapping
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Width:178mm
Height: 216mm
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3.2.2 DataRegister Mapping forAnalog I/Obases
DataincontrollerregistersismappedtothefieldterminalsofanalogI/Obasesin
thefollowingway:
H Eachanalogvalueismappedtooneword.
H
TheMostSignificantWord(MSW)issentorreceivedfirst.
H ThewordssentbythecommunicationsadaptertotheI/Obaserepresentthe
outputvaluesandparameters(Output-words).
H
ThewordssentfromtheI/Obasetothecommunicationsadapterrepresent
theinputvaluesandstatus(Input-words).
DatamappingforoneanalogI/Obaseisshownasanexample:
I/OMapping ofthe170AAI14000(16InputChannels) e.g.
InputDatafrom170AAI14000
MSW=Word16
Word15
Word5
Valuechannel16
Valuechannel15
Valuechannel5
Word4
Word3
Word2
LSW=Word1
Valuechannel4
Valuechannel3
Valuechannel2
Valuechannel1
Output Datato170AAI14000
MSW=Word16
Word15
Word5
empty
empty
empty
Word4
Word3
Word2
LSW=Word1
Parameters,Channels5...8
Parameters,Channels1..4
Parameters,Channels13...16
Parameters,Channels9...12
to to
Additional documentation: RefertotheI/ObasesUserManual (870USE002
00)forfurther information.
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