Alarms

How do I open Alarms?
  1. In
    Library Objects
    , select a controller or local tag.
  2. In the decorator panel, select
    Alarms
    .
Use
Alarms
 to view and edit configured alarms for a selected tag.
Column
Description
Read Only / Allows Substitution
01 General
Name
The alarm definition name. Can contain up to 40 characters.
Read-only.
Used
Marks the alarm as active and ready for evaluation.
Read-only if the alarm has an
Alarm Definition
 attribute and the Definition value is set to TRUE.
Input
The alarm's input that can either be a tag or parameter.
Read-only.
02 Condition
Type
The type of alarm, either digital or analog.
Read-only.
Expression
Determines whether the alarm is triggered when the Input is true or false.
For Boolean input, when Expression is set to =1, the alarm is triggered when the input is true. When Expression is set to =0, the alarm is triggered when the input is false.
For analog input, the expression can be set to >, >=, =, <, <=, or <>.
Read-only.
Limit
The value that the condition is evaluated against.
Allows substitution.
Target Tag
The target tag for the alarm.
Allows substitution if the alarm does not have an
Alarm Definition
 attribute. Only available if the type is
DEV_HI
 or
DEV_LO
.
03 Data
On Delay
Duration in milliseconds from the time that the alarm condition occurs until the alarm notification is set.
Allows substitution.
Off Delay
Duration in milliseconds from the time that the alarm condition ends until the alarm becomes inactive.
Allows substitution.
Deadband
A value added to the alarm limit to determine when the alarm condition ends.
Allows substitution.
Severity
Displays the alarm severity, where 1 is the least severe and 1000 is the most severe. The severity does not affect how the controller processes the alarm, but it can be used by devices that monitor the alarm. The default severity is 500.
By default, severity ranges are mapped to the following priorities:
  • 1...250 are
    Low
     priority.
  • 251...500 are
    Medium
     priority.
  • 501...750 are
    High
     priority.
  • 751...1000 are
    Urgent
     priority.
Allows substitution.
Shelve Duration
The number of minutes the controller postpones processing the alarm.
Allows substitution.
Message
The message displayed on the alarm's monitoring device.
Allows substitution.
Tag1
Contains data pertinent to the alarm to be transmitted to subscribers.
Allows substitution. Only available if the alarm has an
AssocTag1
 attribute.
Tag2
Contains data pertinent to the alarm to be transmitted to subscribers.
Allows substitution. Only available if the alarm has an
AssocTag2
 attribute.
Tag3
Contains data pertinent to the alarm to be transmitted to subscribers.
Allows substitution. Only available if the alarm has an
AssocTag3
 attribute.
Tag4
Contains data pertinent to the alarm to be transmitted to subscribers.
Allows substitution. Only available if the alarm has an
AssocTag4
 attribute.
04 Class / Group
FTGroup
Tags the alarm with a group name to help classify and sort alarms.
Allows substitution if the alarm does not have an
Alarm Definition
 attribute.
Class
Use classes to group related alarms.
Allows substitution if the alarm does not have an
Alarm Definition
 attribute.
05 Advanced
FactoryTalk®
View Command
A
FactoryTalk
 View command that can be run on the operator station when the alarm notification appears.
Allows substitution if the alarm does not have an
Alarm Definition
 attribute.
Latched
Latches the alarm. A latched alarm remains active after the alarm condition becomes false, until a reset command is received. The reset command is ignored until the alarm condition is false.
Allows substitution.
Acknowledgment Required
Sets if acknowledgment is required for the alarm.
Allows substitution.
Include in Alarm Set roll-up count
Sets if this alarm is included in the rollup counters of an alarm set containing this alarm.
Allows substitution.
Include in Alarm Set operations
Sets if this alarm is included when an operation is performed on an alarm set containing this alarm.
Allows substitution.
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