Hitachi SJ-P1 Series - Page 58

7-13
Chapter 7
About the Modbus TCP
[Response]
The normal response returns the function code,
starting address, and quantity of coils forced.
Hi: high order
Lo: low order
Address
Blocks
Items
Code
0
Modbus TCP
header part
Transaction ID (Hi)
15h
1
Transaction ID (Lo)
01h
2
Protocol ID (Hi)
00h
3
Protocol ID (Lo)
00h
4
Data size (Hi)
00h
In the case, 6 byte lengths
(address 6 through 11).
5
Data size (Lo)
06h
6
Unit ID
FFh
7
Modbus
data part
Function code
0Fh
8
Starting address (Hi)
00h
9
Starting address (Lo)
00h
10
Quantity of coils (Hi)
00h
11
Quantity of coils (Lo)
0Fh