《工業(yè)互聯(lián)網(wǎng)基礎(chǔ)（雙語）》課件-6.有線網(wǎng)絡(luò)通信的通信協(xié)議

有線網(wǎng)絡(luò)通信通信協(xié)議工業(yè)互聯(lián)網(wǎng)基礎(chǔ)（雙語）WiredNetworkCommunicationCommunicationProtocol在有線通信系統(tǒng)中，數(shù)據(jù)傳輸?shù)姆绞娇煞譃榇型ㄐ?、并行通信方式兩種。串行采用一位一位的傳輸數(shù)據(jù)位，并行采用一組一組的傳輸數(shù)據(jù)位。Inwiredcommunicationsystems,datatransmissionmethodscanbedividedintoserialandparallelcommunication.Serialistouseone-by-onetransmissiondatabits,whileparallelusesagroupoftransmissiondatabits.由于串口通信的高可靠性，在工業(yè)現(xiàn)場通信中大多使用該類通信方式，其串行通信接口標(biāo)準(zhǔn)主要有：RS232、RS485等。Duetothehighreliabilityofserialcommunication,thistypeofcommunicationiswidelyusedinindustrialfieldcommunication.Themainserialcommunicationinterfacestandardsusedare:RS232,RS485,etc.RS232RS232接口標(biāo)準(zhǔn)，主要實現(xiàn)點對點的通信方式。它是PC機(jī)與工業(yè)儀器通信使用最廣泛的一種串行接口，RS232采取不平衡傳輸方式，最高速率為20Kbps。RS232interfacestandardmainlyrealizespoint-to-pointcommunication.ItisthemostwidelyusedserialinterfaceforcommunicationbetweenPCsandindustrialinstruments.Itadoptsanunbalancedtransmissionmethod,withamaximumrateof20Kbps.接收發(fā)送接地RS232接口連接器RS232interfaceconnectorRS485RS485，是一種串行總線通信協(xié)議，逐位數(shù)據(jù)傳輸方式，可支持多點數(shù)據(jù)通信。采用公共通信干線逐位傳輸數(shù)據(jù)RS485isaserialbuscommunicationprotocol,abit-by-bitdatatransmissionmode,whichcansupportmulti-pointdatacommunication.Itusespubliccommunicationtrunkstotransmitdatabitbybit.典型的計算機(jī)總線通信結(jié)構(gòu)ThetypicalcomputerbuscommunicationstructureRS232-RS485轉(zhuǎn)換器RS232-RS485converterModBusModBus，主要解決一根雙絞線實現(xiàn)與多個設(shè)備間的通信，也是當(dāng)前最受歡迎的工業(yè)串行通信協(xié)議的一種，其支持傳統(tǒng)的RS-232、RS-422、RS-485和以太網(wǎng)設(shè)備。ModBusmainlyfocusesonthecommunicationbetweenatwistedpairwireandmultipledevices.Itisalsooneofthemostpopularindustrialserialcommunicationprotocols.ItsupportstraditionalRS-232,RS-422,RS-485andEthernetequipment.PROFIBUSPROFIBUS，是一種開放式的，不依賴于設(shè)備生產(chǎn)商的現(xiàn)場總線標(biāo)準(zhǔn)，用于工廠自動化車間級監(jiān)控和現(xiàn)場設(shè)備層數(shù)據(jù)通信與控制的現(xiàn)場總線技術(shù)。PROFIBUSisanopenfieldbustechnologythatdoesnotdependonthefieldbusstandardoftheequipmentmanufacturer,andisusedforfactoryautomationworkshop-levelmonitoringandfielddevice-leveldatacommunicationandcontrol.工業(yè)以太網(wǎng)IndustrialEthernet工業(yè)以太網(wǎng)，本質(zhì)上是標(biāo)準(zhǔn)以太網(wǎng)技術(shù)在工業(yè)領(lǐng)域的延伸與應(yīng)用。被廣泛應(yīng)用的工業(yè)以太網(wǎng)標(biāo)準(zhǔn)主要有：ModbusTCP/IP、Ethernet/IP、PROFINET、SercoIII等。IndustrialEthernetisessentiallyanextensionandapplicationofstandardEthernettechnologyintheindustrialfield.ThewidelyusedindustrialEthernetstandardsmainlyinclude:ModbusTCP/IP,Ethernet/IP,PROFINET,etc.RJ-45RJ-45，是最常見的一種以太網(wǎng)接口標(biāo)準(zhǔn)。采用TCP/IP協(xié)議，該協(xié)議是在多個不同網(wǎng)絡(luò)間實現(xiàn)信息傳輸?shù)膮f(xié)議簇。RJ-45isthemostcommonEthernetinterfacestandard.ItadoptsTCP/IPprotocol,whichisaprotocolclusterthatrealizesinformationtransmissionamongmultipledifferentnetworks.T568A/T568B線序T568A/T568BwiresequenceOPCOPC，是一種針對現(xiàn)場控制系統(tǒng)的一個工業(yè)硬件和軟件的接口標(biāo)準(zhǔn)，其目的就是為了不同供應(yīng)廠商的設(shè)備和應(yīng)用程序之間的接口標(biāo)準(zhǔn)化，使其間的數(shù)據(jù)交換更加簡單化。OPCisanindustrialhardwareandsoftwareinterfacestandardforfieldcontrolsystems.Thepurp