Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual de usuario descargar pdf (Pagina 204)

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101

Section 7. Installation

204

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addressing systems that allow multiplexing of several sensors on a single

communications port, which makes for more efficient use of resources.

7.8.8.4 Glossary of Terms

Asynchronous

Indicatesthesendingandreceivingdevicesarenotsynchronizedusinga

clocksignal.

Baudrate

Therateatwhichdataaretransmitted.

BigEndian

"Bigendfirst."Placingthemostsignificantintegeratthebeginningofa

numericword,readinglefttoright.

cr

Carriagereturn

Databits

Numberofbitsusedtodescribethedata,andfitbetweenthestartand

stopbits.Sensorstypicallyuse7or8databits.

Duplex

Canbehalforfull.Full‐duplexissimultaneous,bidirectionaldata.

lf

Linefeed

LittleEndian

"Littleendfirst."Placingthemostsignificantintegerattheendofa

numericword,readinglefttoright.

LSB

Leastsignificantbit(thetrailingbit)

MarksandSpaces

RS‐232signallevelsareinvertedlogiccomparedtoTTL.Thedifferent

levelsarecalledmarksandspaces.Whenreferencedtosignalground,

thevalidRS‐232voltagelevelforamarkis‐3to‐25,andforaspaceis

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