Datalogger Qair Protocol - MAGEE Scientific Aethalometer AE33 User Manual

Aethalometer
Model AE33
00000100 – LED calibrating,
00100000 – clean air test,
01000000 – stability test,
01100000 – tape change,
10000000 – optical test,
11000000 – (inlet) leakage test.
<errStatus> is the status of instrument problems:
00000000 – no error,
00000010 – flow problem,
00000100 – led problem,
00001000 – chamber problem,
00010000 – external device problem.

10.1.8 Datalogger Qair protocol

The instrument supports data acquisition over the 'Qair' protocol which complies with the
"Communication protocol for digital links with air quality data acquisition stations ver. 3.1".
This is a limited version of the industrial JBUS communication protocol.
The standard command format is: <slave number><function code><address><number of
words><CRC16>
<Slave number> - Instrument External ID, values from 1 – 255. (1 byte)
<Function code> - Supported function code is 3. (1 byte)
<address> - Supported address values are 0,10,20,30,34,37,179,187 (all decimal). (2 bytes).
<Number of words> - Number of words in the response message. (2 bytes)
<CRC 16> - checksum. (2 bytes).
____________________________________________________________________________________________________________
User's manual – Ver. 1.55 July 2017 96/146