Hitachi SJ-P1 Series User Manual page 61

Chapter 7
[Response]
The normal response contains the data from the
group of registers that were read.
Address Blocks
0
1
2
Modbus TCP
3
header part
4
5
6
7
8
9
Modbus
data part
10
11
12
Hi: high order
Lo: low order
Items
Transaction ID (Hi)
Transaction ID (Lo)
Protocol ID (Hi)
Protocol ID (Lo)
Data size (Hi)
Data size (Lo)
Unit ID
Function code
Byte count
Read register value 1 (Hi)
Read register value 1 (Lo)
Read register value 2 (Hi)
Read register value 2 (Lo)
7-16
About the Modbus TCP
Code
15h
01h
00h
00h
00h
In the case, 7 byte lengths
(address 6 through 12).
07h
FFh
17h
04h
00h
00h 0000 0BB8h
→3000d→30.00[s]
0Bh
B8h