Appendix B 3. Modbus abnormality response code DVP10MC11T supports: 4. Modbus Function Code: Function code: 03 to read one single or multi word-device register value Request message data structure: Response message data structure:
B-4 DVP-MC operating manual Abnormality response code Indication 0x01 Unsupportive function code 0x02 Unsupportive Modbus address 0x03 Data length exceeds the range Data order Name Byte Byte0 Transaction identifier High byte Byte1 Low byte Byte2 Protocol identifier High byte Byte3 Low byte Byte4 Modbus data length High byte Byte5 Low byte Byte6 Modbus ID Low byte Byte7 Function code Single byte Byte8 Read the start address of the word device in DVP10MC11T High byte Byte9 Low byte Byte10 Read the device address number in DVP10MC11T （Counted by Words） High byte Byte11 Low byte Data order Name Byte Byte0 Transaction identifier High byte Byte1 Low byte Byte2 Protocol identifier High byte Byte3 Low byte Byte4 Modbus data length High byte Byte5 Low byte Byte6 Modbus ID Single byte Byte7 Function code Single byte Byte8 The data length of the read word device content value in DVP10MC11T （Counted by Bytes） Single byte