5 User Communication
3-84 WindO/I-NV4 User’s Manual
- The BCC calculation type is XOR.
02h^41h^42h^43h^44h^31h^32h^33h^34h^=02h
- When the BCC calculation result is 0002h, the converted data will be 3032h.
- When the converted data is 3032h, the data for comparison with the BCC part of the receive data will be
3032h.
- The comparison data is compared with the BCC part of the receive data.
In the following receive data, when the comparison data is the 2-byte 3032h, there is a match since the BCC part
data is 3032h.
When there is no match, the BCC Error (address number+0, bit 0) of Status Device Address changes to 1.
• When data reception is successfully completed, the Completed Device Address LM203 changes to 1.
• When the value of each bit of address number+0 for Status Device Address LDR250 is 0, transmission is completed
without an error.
0002h
Hexadecimal to ASCII
0
(30h)
Data
2
(32h)
0
(30h)
2
(32h)
Comparison data
0
(30h)
2
(32h)
Bytes: 2
Converted data
(Second byte) (First byte)
Comparison data
Match
Receive data BCC part
3
(33h)
4
(34h)
1
(31h)
STX
(02h)
2
(32h)
A
(41h)
B
(42h)
C
(43h)
D
(44h)
CR
(0Dh)
LF
(0Ah)
0
(30h)
2
(32h)
0
(30h)
2
(32h)
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