IDEC SmartAXIS Touch FT1A Series, User Manual

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SmartAXIS Touch User's Manual
22-49
5 User Communication
22
Communication
• Bytes and BCC data
When the converted data is 3034h , the data appended to the transmission data is as follows.
• When Calculation Type is Modbus ASCII (LCR)
When the BCC calculation result is 4241h after Binary (HEX) to ASCII conversion the resulting two bytes of data
is appended to the transmission data.
• When Calculation Type is Modbus RTU (CRC)
When the BCC calculation result is BA30h with no conversion the two bytes of data is appended to the
transmission data.
0
(30h)
(Second byte) (First byte)
4
(34h)
1 byte
BCC data
Converted data
4
(34h)
0
(30h)
4
(34h)
BCC data
0
(30h)
4
(34h)
Converted data
2 bytes
(Second byte) (First byte)
B
(42h)
A
(41h)
B
(42h)
A
(41h)
BCC data
4241h
Binary (HEX) to ASCII
Data
Converted data
2 bytes
(Second byte) (First byte)
BAh 30h BAh 30h
BA30h
No conversion
BCC data
Data
Converted data
2 bytes
(Second byte) (First byte)