Vaisala WINDCAP WMT52 - Examples of Am, Ac and Ad Commands

Chapter 7 __________________________________________________ Getting the Data Messages
VAISALA_______________________________________________________________________ 79
Examples of aM, aC and aD
Commands
The device address is 0 in all examples.
Example 1:
Start a wind measurement and request the data (all six wind parameters
are enabled in the message):
0M1!00036<cr><lf> (measurement ready in 3 seconds and 6
parameters available)
0<cr><lf> (measurement completed)
0D0!0+339+018+030+0.1+0.1+0.1<cr><lf>
<cr><lf> = Response terminator
NOTE
aD0 command can also be used to break the measurement in progress
started with commands aM, aMC, aC or aCC.
NOTE
In SDI-12 v1.3 Continuous measurement mode (aXU,M=R) the
sensor makes measurements at configurable update intervals. The aD
command following the aM, aMC, aC or aCC command always
returns the latest updated data. Thus in aXU,M=R mode issuing
consecutive aD commands may result in different data strings if the
value(s) happen to be updated between the commands.
NOTE
The parameter order in messages is as follows:
Wind (M1): Dn Dm Dx Sn Sm Sx
Supv (M5): Th Vh Vs Vr Id
Comp (M): Wind Supv (parameters in above order)
The parameters are in the same order as in the Setting Field tables in
chapter Sensor and Data Message Settings on page 95. The order of the
parameters is fixed, but you can exclude any parameter from the list
when configuring the sensor.