Part two (indicates that the data is ready to be requested):
a<cr><lf>
a
Device address
ttt
The measurement completing time in seconds
n
The number of the measured parameters available (maximum number is 9)
<cr><lf>
Response terminator
When the measurement takes less than one second, part two of the response is not sent.
This is the case in the pr
ecipitation measurement aM3.
The maximum number of parameters that can be measured with aM and aMC commands
is nine
. If more parameters must be measured, use Start concurrent measurement
commands aC and aCC (for which the maximum number of parameters to be measured is
20).
More Information
‣
Ex
amples of aM, aC and aD C
ommands (page 98)
‣
Sensor Configuration
and Data Message Formatting (page 117)
‣
Start Concurrent Measurement (aC) (page 96)
‣
Start Concurrent Measurement with CRC (aCC) (page 97)
7.3.6 Start Measurement Command with CRC (aMC)
Command format:
aMCx!
This c
ommand asks the device to make a measurement and a three-character CRC is added
to the response data strings before <cr><lf>.
To request the measured data, use the Send data command aD.
More Information
‣
Send Data Command (aD) (page 97)
Chapter 7 – Retrieving Data Messages
95
sales@streamlinemeasurement.co.uk
www.streamlinemeasurement.co.uk
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