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Alarm Configuration
3-20 Advanced Alarm Configuration
7. Since the first sample taken can be misleading, you can use the selections in
the Startup Alarm box to disable either the rising or the falling threshold for
that sample only. If you would like to exclude the falling alarm, select the
Rising option; the first sample taken will only generate a rising alarm, even if
the sample value is at or below the falling threshold. To exclude the rising
alarm, select the Falling option; the first sample will then only generate a
falling alarm, even if the sample value is at or above the rising threshold. If you
wish to receive both alarms as appropriate, select the Both option.
8. Use the selections in the Sample Type box to indicate whether you want your
threshold values compared to the total count for the variable (Absolute), or to
the difference between the count at the end of the current interval and the
count at the end of the previous interval (Delta). Make sure you have set your
thresholds accordingly.
9. Click in the Rising Threshold field; enter the high threshold value for this
alarm.
10. There are two ways to assign an event to your rising threshold: click in the
Rising Event Index text box and enter the number of the event you would like
to see triggered if the rising threshold is crossed; or use the Events Watch list
in the main Alarm/Event window to highlight the desired event, then click on
the Rising Event Index button. Be sure you assign the number of a valid
event or there will be no response if the selected variable meets or crosses
this threshold; assigning an index of zero effectively disables the threshold, as
there will be no indication that it has been crossed.
For more information on how events are triggered, see How Rising and
Falling Thresholds Work, on page 3-28.
11. Click in the Falling Threshold field; enter the low threshold value for this
alarm.
12. There are two ways to assign an event to your falling threshold: click in the
Falling Event Index text box and enter the number of the event you would like
to see triggered if the falling threshold is crossed; or use the Events Watch list
in the main Alarm/Event window to highlight the desired event, then click on
the Falling Event Index button. Again, be sure you assign the number of a
valid event or there will be no response if the selected variable meets or
crosses this threshold; assigning an index of zero effectively disables the
threshold, as there will be no indication that it has been crossed.
For more information on how events are triggered, see How Rising and
Falling Thresholds Work, on page 3-28.
NOTE
There is no limit to the number of alarms that may be assigned to the same event.