AP 3-11
Write Single Holding Register [06H]
Write single holding register. The register address of the holding register is specified in the
message.
Example: Write a 60.00Hz frequency command to node address 1.
ASCII Mode
Command Message esponse Message (Normal) Response Message (Error)
3AH STX 3AH STX 3AH STX
30H
Node
Address
30H
Node
Address
30H
Node
Address
31H 31H 31H
30H
Function
30H
Function
38H
Function
36H 36H 36H
32H
Starting
Register
32H
Starting
Register
30H
Exception
code
35H 35H 33H
30H 30H 30H
LRC CHECK
32H 32H 32H
31H
DATA
31H
DATA
0DH
END
0AH
37H 37H
37H 37H
30H 30H
34H
LRC CHECK
34H
LRC CHECK
42H 42H
0DH
END
0DH
END
0AH 0AH
RTU Mode
Command Message Response Message (Normal) Response Message (Error)
Node Address 01 H Node Address 01H Node Address 01H
Function 06H Function 06H Function 86H
Start No
High 25H
Start No
High
Exception
code
Exception code 03H
Low 02H Low 02H
CRC-16
High 02H
Number of
Registers
High 17H
Number of
Registers
High 17H Low 61H
Low 70H Low 70H
CRC-16
High 2DH
CRC-16
High 2DH
Low 12H Low 12H