Hitachi WJ200-001L, Instruction Manual

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Ver.3
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42
The value of internal register number 120Fh(A013), that is linked to external register, is read out.
If you create a mapping like above, access to low order side of register number 1219 (A021) is forbidden.
Because 1218h belongs to A021(High), 1218h is used for mapping function. Thus, you are forbidden to use
1218h and 1219h directly as A021. Please refer to the below example.
When an error occurs when reading out
Query:
Response:
No Field Name Example
(Hex)
1 Slave address 01
2 Function code 83
3 Exception code 32
4 CRC-16 (high order) C0
5 CRC-16 (low order) E5
Exception code 31 and 32 represent access error of overlapping register.(Mapping Error)
No Field Name Exam
ple
(Hex)
1 Slave address 01
2 Function code 03
3 Register start address (high order) 12
4 Register start address (low order) 18
5 Number of holding registers (high order) 00
6 Number of holding registers low order) 01
7 CRC-16 (high order) 01
8 CRC-16 (low order) 75
One register
Register address value
= Register
Number - 1