Hitachi WJ200-001S Instruction Manual page 553

Ver.3− − − − 44
An error occurs with writing data
Query:
No
1 Slave address
2 Function code
3 Register start address (high order)
4 Register start address (low order)
5 Change data (high order)
6 Change data (low order)
7 CRC-16 (high order)
8 CRC-16 (low order)
Response:
No
1 Slave address
2 Function code
3 Exception code
4 CRC-16 (high order)
5 CRC-16 (low order)
If you create a mapping like above, access to low order side of register number 1219 (A021) is forbidden.
Because if use of parameter A021 (Low) is allowed, A012 (High) area might be overridden when very big
number is entered in A021. Please refer to the example above.
Field Name
Field Name
Example
(Hex)
01
06
12
18
10
00
01
75
Example
(Hex)
01
86
32
C3
B5
Register address value
= Register
Number - 1
1000h→4096d →40.96Hz