Appendix A Modbus Function code The function code and abnormality response code when COM2 port is possessed by motion control module are listed in the following table. The function code and abnormality response code when COM1 and COM2 ports are possessed by PLC module in DVP10MC11T are listed in the following table. DVP-MC operating manual A-15 Device name Device no. Type Address（hex） D 9984~9999 Word A700~A70F Available Function code Explanation device 0x02 Read bit-device register value; the data of 256 bits at most can be read one time. M,I,Q 0x03 Read one single or multi word register value; the data of 64 words at most can be read one time.
D 0x05 Write one single bit-device register value. M ,Q 0x06 Write one single word-device register value. D 0x0F Write multi bit-device register value; the data of 256 bits at most can be written one time. M,Q 0x10 Write multi word-device register value; the data of 64 words at most can be written one time. D Abnormality Explanation response code 0x01 Unsupportive function code 0x02 Unsupportive Modbus address 0x03 The data length is out of the valid range.
Function code Explanation Available device 0x01 Read bit-device register value excluding the input point state S, Y, M, T, C 0x02 Read the bit-device register value including the input point state S, X, Y, M,T, C 0x03 Read one single or multi word device register value T, C, D 0x05 Write one single bit-device register value S, Y, M, T, C 0x06 Write one single word-device register value T, C, D 0x0F Write multi bit-device register value S, Y, M, T, C 0x10 Write multi word-device register value T, C, D