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上传时间:2025/6/18 9:14:35
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Modbus协议规范英文原版
MODBUSisanapplicationlayermessagingprotocol,positionedatlevel7oftheOSImodel,whichprovidesclient/servercommunicationbetweendevicesconnectedondifferenttypesofbusesornetworks.Theindustry’sserialdefactostandardsince1979,MODBUScontinuestoenablemillionsofautomationdevicestocommunicate.Today,supportforthesimpleandelegantstructureofMODBUScontinuestogrow.TheInternetcommunitycanaccessMODBUSatareservedsystemport502ontheTCP/IPstack.MODBUSisarequest/replyprotocolandoffersservicesspecifiedbyfunctioncodes.MODBUSfunctioncodesareelementsofMODBUSrequest/replyPDUs.TheobjectiveofthisdocumentistodescribethefunctioncodesusedwithintheframeworkofMODBUStransactions.
本软件ID:9609480