Filter
Top Products
3.4.3 "Function Code" 16 (Write Multiple Registers)
This "Function Code" 16 (Write Multiple Registers) allows you to write
several consecutive parameters, starting at any address.
Modbus request Structure of the Modbus request:
Field Bytes Value Meaning
Function Code 1 16 = 10
h
Write Multiple Registers
Starting Address 2 (various) Address of the first parameter to be written
Quantity Of Regis-
ters
2 2 * m Number of 16 bit values to be written
(1 parameter has the value 2 since a parameter
consists of a 32 bit value)
Byte Count 1 4 * m Number of data bytes
Registers Value 2 * m (various) Parameter values
Modbus response Structure of the positive Modbus response:
Field Bytes Value Meaning
Function Code 1 16 = 10
h
Write Multiple Registers
Starting Address 2 (various) Corresponds to the Modbus request
Quantity Of Regis-
ters
2 2 * m Corresponds to the Modbus request
Structure of the negative Modbus response
Field Bytes Value Meaning
Function Code 1 10
h
+ 80
h
= 90
h
Write Multiple Registers
Exception Code 1 01
h
... 04
h
See chapter
"3.3.2 Modbus response to a Modbus request"
3 Basics
LXM32M
30 Modbus-TCP module
0198441113843, V1.01, 01.2012