TheobjectiveofthisdocumentistopresenttheMODBUSmessagingserviceoverTCP/IP,inordertoprovidereferenceinformationthathelpssoftwaredeveloperstoimplementthisservice.TheencodingoftheMODBUSfunctioncodesisnotdescribedinthisdocument,forthisinformationpleasereadtheMODBUSApplicationProtocolSpecification[1].ThisdocumentgivesaccurateandcomprehensivedescriptionofaMODBUSmessagingserviceimplementation.ItspurposeistofacilitatetheinteroperabilitybetweenthedevicesusingtheMODBUSmessagingservice.Thisdocumentcomprisesmainlythreeparts:•AnoverviewoftheMODBUSoverTCP/IPprotocol•AfunctionaldescriptionofaMODBUSclient,serverandgatewayimplementation.•AnimplementationguidelinethatproposestheobjectmodelofanMODBUSimplementationexample.
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