台达plc modbus通讯协议

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1、www.plcworld.cnPRODUCTSPECIFICATIONDVPSeriesPLCCommunicationProtocolV1.1aDELTAELECTRONICS,INC.ResponsiblePersonSignatureDateWrittenBy林倉億CheckedBy唐琳黛/杜俊諺Application王俊欽ApprovedBy翟立文www.plcworld.cnPLC工程部技術文件編號：C-PLC-A003ItemChangeNotesDate1第一版發行7/1/20032V1.1版修正1/5/20063新增

2、通訊Buffer長度2/9/20061www.plcworld.cnPLC工程部技術文件編號：C-PLC-A003目錄一、簡介..........................................................................................................................3二、軟體規範.............................................................................

3、......................................3三、機能..........................................................................................................................3四、連線方式.................................................................................................

4、..................6五、通訊格式介紹：........................................................................................................71.通訊資料協定........................................................................................................72.通訊資料格式...............

5、.........................................................................................7i.ASCIIMode...................................................................................................7ii.RTUMode..........................................................

6、...........................................83.通訊工作方式........................................................................................................84.錯誤訊息回應........................................................................................................

7、9六、MODBUS通訊命令格式：.....................................................................................10Function01：ReadCoilStatus...........................................................................10Function02：ReadInputStatus......................................

8、...................................12Function03：ReadHoldingRegisters.................................................