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Read ABC Period
Master Transmit:
<FE> <03> <00> <04> <00> <01> <D1 > <C4>
Slave Reply:
<FE> <03> <02> <00> <B4> <AC> <27>
Data Explain:
<00> <B4> is valid data 0x00B4, decimal is 180 hours.
Setup User Concentration
Master Transmit:
<FE> <06> <00> <07> <01> <90> <2D > <F8>
Slave Reply:
<FE> <06> <00> <07> <01> <90> <2D > <F8>
Data Explain:
<01> <90> is valid data 0x0190, decimal is 400 ppm. It means the user calibration concentration is set to 400 ppm.
<2D> <F8> is CRC and should be calculated based on the user calibration concentration value.
Read User Concentration
Master Transmit:
<FE> <03> <00> <07> <00> <01> <21 > <C4>
Slave Reply:
<FE> <03> <02> <01> <90> <AD> <AC>
Data Explain:
<01> <90> is valid data 0x0190, decimal is 400 ppm.
Setup User Acknowledgement
Master Transmit:
<FE> <06> <00> <05> <00> <00> <8D > <C4>
Slave Reply:
<FE> <06> <00> <05> <00> <00> <8D > <C4>
Data Explain:
<00> <00> is valid data 0x0000, it means to clear the calibration completion flag.
Setup User Special Command
Master Transmit:
<FE> <06> <00> <06> <7C> <01> <9C > <C4>
Slave Reply:
<FE> <06> <00> <06> <7C> <01> <9C > <C4>
Data Explain:
<7C> <01> is valid data 0x7C01, it means to start user calibration.
Read User Acknowledgement
Master Transmit:
<FE> <03> <00> <05> <00> <01> <80> <04>
Slave Reply:
<FE> <03> <02> <00> <01> <AC> <50>
Data Explain:
<00> <01> is valid data 0x0001, it means that the user calibration completion flag has been set to 1, indicating that the
user calibration has been completed.
Tel: 07788 548013
solentgasconsultants@gmail.com
Honeywell CRIR-M1 User Guide
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