u Writing to Multiple RegistersFunction code 10H allows the user to write multiple drive MEMOBUS/Modbus registers with one message. This processworks similar to reading registers, in that the address of the first register to be written and the data quantity are set in thecommand message. The data to be written must be consecutive so that the register addresses are in order, starting from thespecified address in the command message. The data order must be high byte then lower byte.The following table shows an example of a message where a forward operation has been set with a frequency reference of60.00 Hz for the slave 1 drive.If parameter values are changed using the Write command, an Enter command may be necessary to activate or save the datadepending on the setting of H5-11. Refer to H5-11: Communications Enter Function Selection on page 513 and Refer toEnter Command on page 536 for detailed descriptions.Command Message Response Message (normal) Response Message (fault)Slave Address 01H Slave Address 01H Slave Address 01HFunction Code 10H Function Code 10H Function Code 90HStarting No. Upper 00H Starting No. Upper 00H Error Code 02HLower 01H Lower 01H CRC-16 Upper CDHData Quantity Upper 00H Data Quantity Upper 00H Lower C1HLower 02H Lower 02HNumber of Bytes 04H CRC-16 Upper 10HStarting Data Upper 00H Lower 08HLower 01HNext Data Upper 17HLower 70HCRC-16 Upper 63HLower 39HNote: Double the number of the data quantity for the number of bytes in the command message.C.8 Message ExamplesYASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual 519C MEMOBUS/ModbusCommunications
