The deviation alarms feature
- Last UpdatedDec 17, 2024
- 2 minute read
Select the Deviation alarms Feature to add and configure a Deviation alarm on an attribute of Integer, Float, or Double data type. You can add a Deviation alarm Feature to a template or instance. If added to a template attribute, the Deviation alarm Feature is automatically locked in derived objects. Deviation alarm Features cannot be added to attribute arrays.
You can enable up to two categories of Deviation alarms. When enabled, an alarm will be triggered when the attribute level deviates from a target value by a configured amount.
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Major: The major alarm deviation tolerance.
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Minor: The minor alarm deviation tolerance.
For each Deviation alarm, specify the following parameters:
|
Deviation Alarms Feature Parameters |
Description |
|---|---|
|
Tolerance |
The major or minor deviation tolerance that the attribute value must exceed to trigger an alarm. |
|
Priority |
A numeric value for the urgency of the alarm. Valid values are 1 through 999, with 1 being the most urgent. For more information about pre-configuring alarm priorities, see Configure priority ranges for alarm historization, mapping, and shelving . |
|
Alarm message |
Browse and select an existing attribute or type a text string as an alarm message. This text string appears in the InTouch alarm view. |
|
Target |
The setpoint value for deviation calculation. |
|
Deviation deadband |
The amount the attribute value must drop (measured in engineering units) below any of the deviation limits before the respective condition is set to FALSE. |
|
Settling period |
The time, in seconds, allowed for the attribute value to return within allowable range after a Target change is made before the deviation alarm is triggered. A deviation alarm cannot occur again until the alarm clears. The value you specify will be converted to the following format: days hh:mm:ss.fffffff. |
For additional information, see Configure target deviation alarms.