Alarm priorities and severities

FactoryTalk Alarms and Events
 classifies individual alarms and events with both a
severity value
 and a
priority category
:
  • Severity value.
     Assigned from a controller tag--an integer from 1 to 1000.
  • Priority category.
    Spans a range of severity values.
FactoryTalk Alarms and Events
 defines the following presets which group severity values into Low, Medium, High, and Urgent priority categories:
Icon
Severity Value Range
Priority Category
FTAE_Priority_Low
1 to 250
Low
FTAE_Priority_Med
251 to 500
Medium
FTAE_Priority_High
501 to 750
High
FTAE_Priority_Urgent
751 to 1000
Urgent
At runtime, the Alarm and Event Summary and Alarm and Event Banner objects show events which are sorted into these priorities.
The severity ranges and values defined by default for your system can be customized for each priority category. However, doing so will apply the changes to all alarm servers connected to a particular
FactoryTalk Directory
.
To override the system-wide severity ranges associated with each priority category on a per-server basis:
  1. In the
    FactoryTalk
    Explorer
     window of
    FactoryTalk Administration Console
     or
    FactoryTalk View Studio
    , right-click on an alarm server and select
    Properties.
  2. Click on the
    Priorities and History
     tab.
  3. Select
    Enable server-assigned priorities.
Order of precedence
You can set alarm priorities as a:
  • Property for each alarm server
  • System-wide alarm policy
Alarm priority levels are resolved in this order:
  1. Priorities defined at the alarm server always take precedence over system-wide policy settings.
  2. System-wide policy settings cannot be disabled--if the alarm server does not have priority settings defined, the system-wide settings guarantee that every event is assigned a priority level based on its severity value.
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