Hitachi WJ200-001S Instruction Manual page 561

Ver.3− − − − 52
(3) Reading Holing Register [03h],:Target register (Second pair)
Query:
No
1 Slave address
2 Function code
3 Register start address (high order)
4 Register start address (low order)
5 Number of holding registers (high order)
6 Number of holding registers (low order)
7 CRC-16 (high order)
8 CRC-16 (low order)
Response:
No
1 Slave address
2 Function code
3 Data size (in bytes)
4 Register data 1 (high order)
5 Register data 1 (low order)
6 CRC-16 (high order)
7 CRC-16 (low order)
Field Name
Field Name
Example
(Hex)
01
03
12
0F
00
01
B1
71
Example
(Hex)
01
03
02
00
50
B8
78
Register address value
= Register
Number - 1
One register