Vaisala WMT700 - Manual (Page 154)

User's Guide ______________________________________________________________________
WS425 F/G ASOS Data Message
WMT700 responds to the WA command with a data message
described in Table 45 below.
Table 45 WS425 F/G ASOS Data Message
Byte Description
1 Start of text
2 Sensor ID
3 Command identifier
4 Sensor status:
P = Pass
F = Fail
H = Heater failure
For further information, refer to notes 1 and 2.
5-7 Averaged wind direction (degrees)
8-10 Wind direction (degrees) @ peak wind speed
11-12 Averaging time for wind speed and direction
13-14 Averaging time for peak wind speed and direction (seconds)
15-19 Averaged wind speed
20-24 Peak wind speed since last WA command
25 Wind speed unit:
M = Miles per hour
K = Knots
L = Kilometers per hour
T = Meters per second
26-27 Signal quality. For further information, refer to note 3.
28-29 Hex checksum. For further information, refer to note 4.
30 End of text
31 Carriage return
32 Line feed
Notes:
1. The sensor status (byte 4) indicates the following:
- P (Pass) indicates that all diagnostic tests have passed
and WMT700 is functioning normally.
- F (Fail) indicates that one or more of the diagnostic tests
have failed. You can then request diagnostics and
extended tests (WS) to further isolate the problem.
- H (Heater failure) indicates that the wind reading is valid
but one or more built-in heater diagnostic tests have
failed.
2. When the status byte is F, the wind direction fields are set to
999 and the wind speed fields are set to 999.9 in the
applicable sensor response messages.
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