Simrad SU90 - About the NMEA Telegram Format; National Marine Electronics Association (NMEA)

Telegramformats
CM60system
ThefollowingtelegramissenttotheCM60system.
→MDSMeasureddatashoalonpage243
OntheSimradSU90Installationmenu,thisinformationiscontrolledbyselectingI/O
Setup→T argetOutput→CM60.
ITItrawlsystem
ThefollowingtelegramissenttotheITIsystem.
→TPPTrackedtargetpositionormarkeronpage247
OntheSimradSU90Installationmenu,thisinformationiscontrolledbyselectingI/O
Setup→TrawlSystem→ITI.
AbouttheNMEAtelegramformat
TheSimradSU90cansendandreceiveinformationtoandfromseveraldifferent
peripherals.Alltransmissionstakeplaceastelegramswithdatasentences.Each
telegramhasadenedformatandlength.
TheNMEA0183standardisthemostcommonprotocolusedtoreceiveandtransmitdata
toandfromperipheralsensors.AparametricsentencestructureisusedforallNMEA
data.Thesentencestartwitha“$”delimiter,andrepresentthemajorityofapproved
sentencesdenedbythestandard.Thissentencestructure,withdelimitedanddened
datales,isthepreferredmethodforconveyinginformation.
FormoreinformationabouttheNMEAstandard,theformatandthedatasentences,refer
totheirofcialpublications.TheirdocumentNMEA1083-Standardforinterfacing
marineelectronicdevicesexplainstheformatsindetail.Thedocumentcanbeobtained
fromhttp://www.nmea.org
.
Topics
•NationalMarineElectronicsAssociation(NMEA)onpage231
•NMEAtelegramprinciplesonpage232
•StandardNMEA0183communicationparametersonpage232
•NMEAsentencestructureonpage232
NationalMarineElectronicsAssociation(NMEA)
TheNationalMarineElectronicsAssociation(NMEA)hasdenedcommunication
standardsformaritimeelectronicequipment,andtheSU90echosounderconformsto
thesestandards.ThemostcommonstandardisNMEA0183,andtheNationalMarine
ElectronicsAssociationdescribesitasfollows:
381293/A
231