CAN130021CANCANCANTU85ACANControllerAreaNetworkCANCAN2.0BCANCANCANCANCANCANOSI(OpenSystemInterconnectionReferenceModel)11CANOSILLCMACPLSCANLLCMACPLSPLSMACLLCCANLLCLLCMACCANPLS/CANCAN4CAB2.0B47CRC22CAN2.0B11293320089JournalofChangchunUniversityofScienceandTechnologyHigherEducationEditionVol.3No.3Sep.2008*2008051419731.SOF2.13311RTR2CAN/CSMA/CACAN3.44IDECAN2.0BIDErr0DLC3~DLC0rddd011000H84.0~8DL3~DL05.CRCCRC55CRCCRCCRCCRCCRC16CRCCRCCRCCRC15+14+10+8+7+4+3+16.ACK662CRC7.7ABAABCRC6RTRPLC0~8CRC51.27718236666CAN66~12782.CANCAN56CRCCRCCRC3.CANCAN818111~1271127128~25512825525696111282889931.M.2006.2.CANM.2004.3.M.2005.TheAnalysisofCANProtocolLiYuliElectronicSchoolofJilinArchitecturalandCivilEngineeringInstituteChangchun130021ChinaAbstractThedevelopmentandapplicationoffieldbuscausedthechangesforthetraditionalcontrolsystem.ControlLANCANbusarewidelyusedinthefieldofautomaticcontrol.becauseoftheirowncharacteristicsThispapergivesadetailedexplanationtoCANbusprotocolworks.KeywordsCANbusrecessivebitdominantbitnode183CAN