u
Writing to Multiple Registers
Function code 10h allows the user to write
multiple drive MEMOBUS/Modbus registers with one message. This process
works similar to reading registers, i.e., the address of the first register that is to be written and the data quantity must be
set in the command message. The data to be written must be consecutive so that the register addresses are in order, starting
from the specified 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
of 60.00 Hz for the slave 1 drive.
If parameter values are changed using the Write command, depending on the setting of H5-11, an Enter command will be
necessary to activate the data or save them. Refer to H5-11: Communications Enter Function Selection on page 410 and
Refer to Enter Command on page 428 for detailed descriptions.
Command Message Response Message (normal) Response Message (fault)
Slave Address 01H Slave Address 01H Slave Address 01H
Function Code 10H Function Code 10H Function Code 90H
Starting No.
Upper 00H
Starting No.
Upper 00H Error Code 02H
Lower 01H Lower 01H
CRC-16
Upper CDH
Data Quantity
Upper 00H
Data Quantity
Upper 00H Lower C1H
Lower 02H Lower 02H
Number of Bytes 04H
CRC-16
Upper 10H
Starting Data
Upper 00H Lower 08H
Lower 01H
Next Data
Upper 17H
Lower 70H
CRC-16
Upper 6DH
Lower 67H
Note: For the number of bytes in the command message, take double the number of the data quantity.
C.9 Message Examples
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
417
C
MEMOBUS/Modbus
Communications
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