7. MODBUS
IMS01T28-E4
7-11
7.2.4 Preset multiple registers [10H]
The query message specifies the starting register address and quantity of registers to be written.
The write data is arranged in the query message with high-order 8-bit first and low-order 8-bit next. Only
R/W holding registers can be specified.
Example
: Data is written into the two holding registers from 008EH to 008FH of slave address 1.
Query message
Slave address
01H
Function code
10H
Starting number
High
00H
Low
8EH
Quantity
High
00H
Low
02H
Number of data
04H
Data to first register
High
00H
Low
64H
Data to next register
High
00H
Low
64H
CRC-16 High
3AH
Low
77H
Normal response message
Slave address
01H
Function code
10H
Starting number
High
00H
Low
8EH
Quantity
High
00H
Low
02H
CRC-16 High
21H
Low
E3H
Error response message
Slave address
01H
80H
Function code
90H
Error code
02H
CRC-16 High
CDH
Low
C1H
First holding register address
The setting must be between 1 (0001H) and
123 (007BH).
Number of holding registers
2
Any pertinent data
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