2 Modbus Protocol
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2.1 Hold Register Specifications
•
Mapping Base Address : 0x0050
•
Hold Register. Max. Read Size : 4
Register
Address
Value
Data Type
Unit
Description
0x0050
Co2
2 Byte Integer
PPM
Co2
Ex) 800 -> 800 PPM
0x0051
Temperature
2 Byte Integer
℃
Temperature
Ex) 255 -> 255 / 10 : 25.5
℃
0x0052
Humidity
2 Byte WORD
%
Humidity
Ex) 75 -> 75%
0x0053
CO
2 Byte WORD
PPM
CO
Ex) 25 -> 25 PPM
2.2 Supported Function Code
•
Currently supported only code 03 and exception response.
•
Error code 0x83 or other(CODE + 0X80)
Exception code
Description
01
Exception of Function code
02
Exception of Starting Address
03
Exception of Quantity of Registers
04
