Vaisala WMT700 - Manual (Page 178)

User's Guide ______________________________________________________________________
SDI-12 Data Messages
When the SDI-12 profile is selected, the data message sent by
WMT700 depends on the command that you use before fetching
the data with the aD0! command.
WS425 A/B SDI-12 Message for C and M
Command
When you have given the commands aC! or aM! followed by
aD0!, the response is the following:
a
where
a = Single-digit WMT700 address that corresponds to
the first character of the address value
= Polar wind speed in selected units
Format: +(ss)s.s
= Polar wind direction in degrees
Format: +(dd)d.d
= x component of wind speed in selected units
Format: ±(ss)s.s
= y component of wind speed in selected units
Format: ±(ss)s.s
= Static speed of sound in miles per hour
Format: ±(ss)s.s
= Terminates the response
The above are measurement data fields.
Missing Readings
If data is missing due to a measurement problem (for example,
blocked paths between transducers), the measurement data is
replaced with 999.9.
Example of the command and response when data is missing:
7D0!
7+999.9+999.9+999.9+999.9+999.9
176 __________________________________________________________________ M211095EN-E