Yaskawa V1000-Series Option SI-EM3D/V Dual Port EtherNet Modbus TCP/IP Technical Manual - Manual (Page 29)

n Write Multiple Registers 16 (10 H)
This function code is used to write to a contiguous block of registers in the drive. The command specifies the starting register
address, the number of registers and the values to be written. The command packs two bytes per register. For each register in
the command the first byte contains the most significant bits and the second byte contains the least significant bits. The normal
response returns the function code, starting address and quantity of registers written.
Table 23 Write Multiple Registers Command
Description Byte Data (Hex)
Slave Address 1 00 to FF
Function Code 1 10
Starting Register 2 0000 to FFFF
Quantity of Registers 2 N <1>
Number of Data Bytes 1 N <1> x 2
Register Values N <1> x 2 0000 to FFFF
<1> N = Quantity of Registers (range is 1 - 16)
Table 24 Write Multiple Registers Response
Description Byte Data (Hex)
Slave Address 1 00 to FF
Function Code 1 10
Starting Register 2 0000 to FFFF
Quantity of Registers 2 N <1>
<1> N = Quantity of Registers
Table 25 Write Multiple Registers Error Response
Description Byte Data (Hex)
Slave Address 1 01
Error Code 1 90
Exception Code 1
Refer to Modbus TCP/IP Exception Codes
on page 31 for details.
Examples of Multiple Registers Write Command
Table 26 lists command examples when writing register values 0001H and 0258H to register addresses 0001H and 0002H in
a drive with the slave address (unit identifier) 01H.
Table 27 shows examples of responses indicating that the write command has been executed successfully. The command
specifies the beginning of the register address and the number of registers.
Table 28 shows examples of an error response when writing to a register. The exception code is 02H (indicating a register
number error).
Table 26 Example Write Multiple Registers Command
Description Data (Hex)
Slave Address 01
Function Code 10
Starting Register
Upper 00
Lower 01
Quantity of Registers
Upper 00
Lower 02
Number of Data Bytes 04
First Register Data
Upper 00
Lower 01
Next Register Data
Upper 02
Lower 58
7 Modbus TCP/IP Messaging
YASKAWA SIEP YAICOM 17A V1000 Option Dual-Port Modbus TCP/IP SI-EM3D/V Technical Manual 29