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DSM250 User’s Manual
Page 24 Revision 1.4.16a
4.3.6 Available Alert Classes
The DSM250 has several classes of alerts, depending on the parameter for which an alert is being
configured.
• Low Alert – The alert will become active if the monitored value drops below the value in this
alert for longer than the time specified in the Set Delay field.
• High Alert – The alert will become active if the monitored value rises above the value specified
in this alert for longer than the time specified in the Set Delay field.
• Data Unavailable Alert – The alert will become active if the monitored value is not received, or
is received but with a value of “Data Not Available”, for longer than the time specified in the Set
Delay field.
• On Alert – The alert will become active if the monitored switch or flag becomes “ON” for longer
than the time specified in the Set Delay field.
• Off Alert – The alert will become active if the monitored switch or flag becomes “OFF” for
longer than the time specified in the Set Delay field.
• Tripped Alert – The alert will become active if the monitored circuit breaker becomes “Tripped”
for longer than the time specified in the Set Delay field.
• Course Alert – The alert will become active if the monitored course differs from the Reference
Direction by more than the Offset COG Set Point for longer than the time specified in the Set
Delay field.
• GPS Quality Alert – The alert will become active if the GPS Quality drops below the level set in
the GPS Quality Alert Set field for longer than the time specified in the Set Delay field.
• Outside Radius Alert – The alert will become active if the distance between the current GPS
position and the Reference Latitude and Longitude rises above the value in the Outside Radius
Alert Set field for longer than the time specified in the Set Delay field.
• Inside Radius Alert – The alert will become active if the distance between the current GPS
position and the Reference Latitude and Longitude falls below the value in the Outside Radius
Alert Set field for longer than the time specified in the Set Delay field.
• Anchor Alert – Similar to the Outside Radius Alert, this alert will become active if the distance
between the current GPS position and the Reference Latitude and Longitude rises above the
value in the Outside Radius Alert Set field for longer than the time specified in the Set Delay
field. The Anchor Alert is more suited for smaller radii, and can be displayed graphically in the
Anchor Watch Display.
• Direction Alert – The alert will become active if the monitored course differs from the
Reference Direction by more than the Offset Wind Direction Set Point for longer than the time
specified in the Set Delay field.
• Tim
er Alert – The alert will become active when the time reaches the time specified in the
Alarm Time field, and thereafter after the intervals specified in the Repeat Interval field.