YASKAWA iQpump Series Programming Manual page 87

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Write In Several Holding Registers (10H)
Write the specified data to the desired slave indicating the desired starting register. The written data must be consecutive, starting from
the specified address in the command message: High Byte (8 bits), then Low Byte 8 bits, in sequential storage register order.
The following table shows an example of a message when a forward Run command has been set at a speed command of 60.0 Hz in the
slave 1 iQpump drive by the PLC.
Command Message
Slave Address
Function Code
Start
Register
No. of
Registers
No. of Bytes*
First
2 Bytes
of data
Second
2 Bytes
of data
CRC-16
Important: Set the number of bytes as quantity of specified registers x 2. Handle response messages in the same way.
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
(During Normal Operation)
01H
10H
High
00H
Byte
Start
Register
Low
01H
Byte
High
00H
Byte
No. of
Registers
Low
02H
Byte
04H
CRC-16
High
00H
Byte
Low
01H
Byte
High
02H
Byte
Low
58H
Byte
High
63H
Byte
Low
39H
Byte
Figure 84 Function Code 08H Message Example
Response Message
Slave Address 01H
Function Code 10H
High
00H
Byte
Low
01H
Byte
High
00H
Byte
Low
02H
Byte
High
10H
Byte
Low
08H
Byte
* No. of bytes = 2 x (# of Registers)
Response Message
(During Error)
Slave Address 01H
Function Code 90H
Error code 02H
High
CDH
Byte
CRC-16
Low
C1H
Byte
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