User’s Guide ______________________________________________________________________
108 _________________________________________________________________ M211840EN-C
The response:
a+<data fields><cr><lf>
Examples of aM, aC and aD
Commands
where
a
=
Device address
<data
fields>
=
The measured parameters in selected units, separated
with '+' marks (or - marks in case of negative
parameter values).
<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 can 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
PTU (M2)
: Ta Tp Ua Pa
Rain (M3)
: Rc Rd Ri Hc Hd Hi Rp Hp
Supv (M5)
: Th Vh Vs Vr Id
Comp (M)
: Wind PTU Rain Supv (parameters in above order)
The order of the parameters is fixed, but you can exclude any
parameter from the list when configuring the transmitter.
