Writing To Multiple Registers - YASKAWA CIMR-VU BA0001 Technical Manual

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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, 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 Enter Command on page 459
Command Message
Slave Address
Function Code
Upper
Starting No.
Lower
Upper
Data Quantity
Lower
Number of Bytes
Upper
Starting Data
Lower
Upper
Next Data
Lower
Upper
CRC-16
Lower
Note: For the number of bytes in the command message, take double the number of the data quantity.
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
Refer to H5-11: Communications Enter Function Selection on page 441
for detailed descriptions.
Response Message (normal)
01H Slave Address
10H Function Code
00H
Starting No.
01H
00H
Data Quantity
02H
04H
CRC-16
00H
01H
17H
70H
6DH
67H
01H
10H
Upper 00H
Lower 01H
Upper 00H
Lower 02H
Upper 10H
Lower 08H
C.9 Message Examples
Response Message (fault)
Slave Address
Function Code
Error Code
Upper
CRC-16
Lower
and
01H
90H
02H
CDH
C1H
C
447