Rockwell-automation FactoryTalk View Site Edition Users Guide Bedienungsanleitung Seite 215

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11 SETTING UP HMI TAG ALARMS
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• • • • •
11 • Placeholder
For more information, see Chapter 12, Setting up FactoryTalk alarms.
Key HMI tag alarms concepts
This section presents some of the common terms and concepts used to describe HMI tag
alarm services, components, and data.
Alarm thresholds for analog tags
An HMI analog tag can trigger a number of alarms when its value crosses various levels,
or thresholds.
You can assign up to eight alarm thresholds, each with a different level of severity to
indicate the alarm’s importance.
The lowest threshold is 1 and the highest is 8. You do not have to use all eight thresholds
for a tag, but the ones you do use must be set up in ascending order. For example, you can
assign thresholds 1, 2, and 8, as long as you assign them in that order.
Thresholds can be increasing (monitoring for a rising value that crosses the threshold) or
decreasing (monitoring for a falling value that crosses the threshold). The tag in the
following example has both increasing and decreasing thresholds.
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