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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, in that the address of the first register to be written and the data quantity are 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, an Enter command may be necessary to activate or save the data
depending on the setting of H5-11.
Refer to H5-11: Communications Enter Function Selection on page 513
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
63H
Lower
39H
Note:
Double the number of the data quantity for the number of bytes in the command message.
C.8 Message Examples
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
519
C
MEMOBUS/Modbus Communications
