
Chapter 5 _________________________________________________________________ Operation
To start continuous measurement, use the START command.
You can stop the measurement with the STOP command. For
instructions, refer to sections START — Start Continuous
Measurement and STOP — Stop Wind Measurement on page
115.
WS425 A/B NMEA Standard Data
Message
The standard variable length, comma-separated, MWV wind
message is defined by NMEA 0183 V2.20 as follows:
$WIMWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>
Wind angle: 0 to 359 degrees
ilometers per hour
eters per second
ata valid
Checksum (8-bit XOR, excluding $ and *)
Carriage return code, ASCII 0DH
Line feed code, ASCII 0AH
NOTE
When the NMEA Standard profile is selected, the
autoInt parameter
-zero value since no polling command is defined for this
Missing Readings
If data is missing due to a measurement problem, the NMEA
messages show "V" in the status field. Wind speed and wind
direction fields are left empty.
VAISALA _______________________________________________________________________ 155
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