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Alarms
WTP3 provides an alarm output via the digital output terminals in the Serial Interfaces.
In the case of an alarm being triggered all digital outputs which are congured to Alarm output will be enabled,
Displays will show an alarm on the assigned function. Alarms are cancelled via the display, or if the value drops
outside the alarm range.
Conguring Alarms
Conguring a function to use an alarm le
Alarms are congured by assigning an alarm le to a function in any conguration les where .cal and .l les are
specied (e.g. sample.d).
The following example shows a nmeain.d le, used for NMEA0183 input of Depth data, with the correct format
for calling a depth alarm le.
Channel 0
Device 7
Com 1 NMEA0183 4800 N 8 1
SDDBT 1 67 depth.cal null.l depth.alm
YXMTW 1 60 seatemp.cal null.l
If no alarm is required on a function the alarm le reference should be set to null.alm (a non-existent le)
File Structure
Alarm les are of the following format, any Alarm les are stored in the alarms directory, all alarm les have the
extension .alm
The following le is an example alarm le for a depth alarm.
Depth 67 C1
Hi 40.0 Off
Lo 2.5 On
Where:
Depth Text label for user information only, it is not used by the system. Must not contain spaces.
67 The function number to apply the alarm to (from bg_vars.d). In this example 67 = Depth.
C1 Fastnet function used to display the alarm on displays (hexadecimal). C1 = Depth.
Hi 40.0 O Congures a High (“Hi”) alarm, at a value of 40.0 which is currently disabled (“O”)
Lo 2.5 On Congures a Low (“Lo”) alarm, at a value of 2.5 which is currently enabled (“On”)
Either the Hi or Lo lines may be omitted from the le, so if only the low value alarm was required the following
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