User's Guide ______________________________________________________________________
30 __________________________________________________________________ M211296EN-A
Alarm Messages
Alarms are sent using plain text messages formatted in similar manner as
observation message CSV. The actual message does not contain
linefeeds; the description below is split into two lines for readability.
(S:<StationName>;D:<YYMMDD>;T:<hhmmss>;
ALARM:<Alarm reason>;<ValueTag>:<Value>)
where
<StationName> = Name of the observation site
<YYMMDD> = Message date UTC, for example 101126
<hhmmss> = Message time UTC, for example 085300
<Alarm reason> = Short description of the source
<ValueTag> = Message tag for the alarming value (optional)
<Value> = Value of the alarming variable (optional)
; = Separator character between fields
: = Separator character between tag and value
Example alarm message:
(S:AWS330;D:101129;T:091500;ALARM:Windspeed;WSMAX10M:30.0)
Table 15 Sensor Alarms
Monitored Sensor Message
HMP155/Temperature Air temperature sensor failure
HMP155/Relative humidity Humidity sensor failure
BARO-1 Barometric pressure sensor failure
WMT703/Wind direction Wind direction sensor failure
WMT703/Wind speed Wind speed sensor failure
WAV15/WAA15 N/A. Sensor failure is not detectable by
AWS330
RG13 N/A. Sensor failure is not detectable by
AWS330
CMP6 Solar radiation sensor failure
QMT110 Soil temperature 1/2 sensor failure
IRU9429 Snow height sensor failure
Example sensor alarm message:
(S:AWS330;D:101209;T:091600;ALARM:Humidity sensor failure)
Sensor failure alarms can be sent as above or as an attachment to table
message. For an example, see section Table Message with Alarm List on
page 291.
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