FieldbusModules
OperatingManualCommunicationinterfaces
1002971EN03
15
DoubleWord Word Byte Content
7 14 28 PayloadByte9
29 PayloadByte10
15 30 PayloadByte11
31 PayloadByte12
4.1.3 Overviewoftables
Thereareatotalof11tables,withthefollowingcontents:
Table20: Processdata,baseunit
Table21: Processdata,righthandexpansionmodules
Table22 Processdata,lefthandexpansionmodules
Table23: Processdata,fieldbusmodule/communicationmodule
Table70: Diagnosticwords
Table71: Enableelements
Table80: Projectinformation
Table90: Devicedata,baseunit
Table91: Devicedata,righthandexpansionmodules
Table92 Devicedata,lefthandexpansionmodules
Table93: Devicedata,fieldbusmodule/communicationmodule
ThecontentofthetablesisdescribedindetailinthechapterentitledService
data[ 65].
4.1.4 Accesstotablesegments
Eachtableconsistsofoneormoresegments.Eachsegmentismadeupof13Bytes.The
tableshaveafixedassignment.TheMasterrequeststherequireddatausingthetable
numberandsegmentnumber.TheSlaverepeatsthetwonumbersandsendsthereques
teddata.Ifdataisrequestedthatisnotavailable,theSlavesendstheerrormessageFF
(hex)or255(dec)insteadofthesegmentnumber.Thesegmentsmayberequestedinany
sequence.