Vaisala WAC155, Руководство пользователя

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4.2.1 MWV Message Format
The NMEA 0183 specification defines wind speed and angle message MWV:
$WIMWV,<a.a>,<R>,<s.s>,<U>,<S>*<CS><cr><lf>
$WIMWV
Fixed text at the start of the message
<a.a>
Wind angle, 0 … 359 degrees
<R> Reference: R = Relative, T = Theoretical
<s.s>
Wind speed
<U>
Units: K = km/h, M = m/s, N = knots (only m/s is
provided)
<S>
Status: A = Valid, V = Invalid
*
Asterisk, indicating that the next field is the
checksum
<CS>
Two-character checksum for the message
The comma (,) is used as a separator between the fields. Here are some examples of MWV
messages:
$WIMWV,39,R,1.3,M,A*06
$WIMWV,61,R,1.0,M,A*08
$WIMWV,39,R,0.5,M,A*01
$WIMWV,59,R,1.2,M,A*01
To enable the automatic MWV message output, use the SETMES command. By
default, no automatic messages are enabled.
More information
‣ SETMES (page 37)
4.2.2 Polling Data with MWV Query
To poll for an MWV message, type the following query:
$WIPKQ,*78<cr>
$WIP
Fixed text at the start of the query
K
Default transmitter device ID
Chapter 4 – Operation
31