Rockwell-automation FactoryTalk View Site Edition Users Guide Instrukcja Użytkownika Strona 216

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FACTORYTALK VIEW SITE EDITION USERS GUIDE
11–4
• • • • •
Example: Alarm thresholds
In this example, a tag’s value changes as it monitors a motors revolutions per minute
(rpm). An X in the illustration shows when the tag goes into alarm, and an O shows when
the tag goes out of alarm.
With the given threshold settings, the motor must run between 2,000 rpm and 3,000 rpm,
or an alarm is triggered.
If the check box, Generate alarms when approaching normal operating range, is
selected in the Alarm Setup editor, alarms will occur when the motor speed falls below
5,000 rpm and 4,000 rpm, and when it rises above 1 rpm and 1,000 rpm.
If the motor speed It triggers an alarm of this severity
exceeds 3000 rpm 8
exceeds 4000 rpm 4
exceeds 5000 rpm 1
falls below 5000 rpm* 4
falls below 4000 rpm* 8
falls below 2000 rpm 8
falls below 1000 rpm 6
falls below 1 rpm 4
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