Simrad ES80 - About NMEA and Standard Datagram Formats; Nmea; About the NMEA Datagram Formats

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AboutNMEAandstandarddatagramformats
Topics
NMEA,page488
AbouttheNMEAdatagramformats,page488
NMEAsentencestructure,page489
StandardNMEA0183communicationparameters,page490
NMEA
TheNationalMarineElectronicsAssociation(NMEA)hasdenedcommunication
standardsformaritimeelectronicequipment.TheES80Widebandshndingecho
soundersupportsthesestandardsforcommunicationwithexternalsensorsandperipheral
systems.
ThemostcommonstandardisNMEA0183.TheNationalMarineElectronics
Associationdescribesitasfollows:
TheNMEA0183InterfaceStandarddeneselectricalsignalrequirements,data
transmissionprotocolandtime,andspecicsentenceformatsfora4800-baudserial
databus.Eachbuscanhaveonlyonetalkerbutmanylisteners.
NationalMarineElectronicsAssociation
FormoreinformationabouttheNationalMarineElectronicsAssociationandtheNMEA
0183standard,refertotheorganization'swebsiteat:
•http://www.nmea.org
AbouttheNMEAdatagramformats
TheES80cansendandreceiveinformationtoandfromseveraldifferentperipherals.
Alltransmissionstakeplaceasdatagramswithdatasentences.Eachdatagramhasa
denedformatandlength.
TheNMEA0183standardisthemostcommonprotocolusedtoreceiveandtransmit
datatoandfromperipheralsensors.Aparametricsentencestructureisusedforall
NMEAdata.
Thesentencestartswitha“$”delimiterandrepresentsthemajorityofapproved
sentencesdenedbythestandard.Thissentencestructurewithdelimitedanddened
datales,isthepreferredmethodforconveyinginformation.
FormoreinformationabouttheNMEAstandard,theformatandthedatasentences,refer
toNMEA ’sofcialpublications.TheNMEA1083-StandardforInterfacingMarine
SimradES80ReferenceManual