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Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Chapter 8
Configure Alarms
Profile Alarms
In addition to managing the alarms similarly to the included static limits with
multipliers solutions (if programmed to do that), the output tag limits solution
offers an ability to apply Profile Alarms.
Profile Alarms are used for applications where a machine performs a fixed,
repetitive cycle over a defined time period or range of another control
parameter. A Profile Alarm likely requires many limits with each correlated to a
specific time, or control parameter range, during the cycle. Profile Alarm limits
create a moving envelope or ‘profile’ of the expected behavior of the
measurement. The controller then loads the appropriate limits to the output
assembly depending on where the machine is in the cycle. Then the controller
observes the input assembly status information to determine status.
In these cases, the module detects and acts or notifies as appropriate when the
measured value falls outside the expected envelope, or profile.
Profile Alarms can be useful in any application where the measurement
(vibration, strain, dynamic pressure) varies normally, and often significantly,
through a repeating process. Typical of these alarms are machine tools and
other non-continuous cutting applications, robotic, or other cyclic motion
applications.
Voted Alarms Page
Voted Alarms are where Measurement Alarms are applied. They provide a
means to verify that a condition warrants an intended action.
Figure 89 - Voted Alarms