Writing To Multiple Registers - YASKAWA P1000 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, 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.
Enter Command on page 536
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: Double the number of the data quantity for the number of bytes in the command message.
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Refer to H5-11: Communications Enter Function Selection on page 513
for detailed descriptions.
Response Message (normal)
01H Slave Address
10H Function Code
00H Upper
Starting No.
01H Lower
00H Upper
Data Quantity
02H Lower
04H Upper
CRC-16
00H Lower
01H
17H
70H
63H
39H
Response Message (fault)
01H Slave Address
10H Function Code
00H Error Code
01H
CRC-16
00H
02H
10H
08H
C.8 Message Examples
and Refer to
01H
90H
02H
Upper CDH
Lower C1H
C
519