Overview
The Alarm Item is the core object of the Alarms Module, it is a tag monitored by the Alarms Module. It contains information such as the tag name and the alarm condition. You can group them into Alarm Groups, simplifying the management of similar or related alarms.
On this page :
Configuring Alarm Items
To configure a new or existing Alarm Item, follow the steps below:
Access Alarms → Items.
On the Tag Name column, type the Tag name or select from the available list. Alternatively, copy and paste the Tag's name from Unified Namespace → Tags.
- Enter the condition to trigger the alarm in the Condition field and configure the treshold value in the Limit field.
- In the Group field, choose which Alarm Group this Item will belong.
- Once finished, on your keyboard press Enter to save the Alarm Item.
To modify an existing Alarm Item, double-click and modify the desired field. Note that any changes made to the Alarm Item will take effect immediately, and the new or modified Alarm Item will be evaluated against the tag values in real-time.
The image below illustrates the process described above. In it, we created an Alarm Item monitoring the tag "ExampleTag" and when its value exceeds or is equal to 50, it will trigger an alarm in the "Warning" Alarm Group.
For more details about each available property field, see the section below.
Alarm Item properties
When configuring an Alarm Item, the essential properties to define are the Tag Name and Condition. These two elements form the core of the configuration, dictating when and how alarms are triggered. Additionally, you can set up other properties based on the specific use of the alarm. The following is a table describing each available property field for the Alarm Item:
If a property column is not visible on the grid, enable it by right-clicking the grid header and selecting it from the list.
Property | Description |
|---|---|
ID | The unique identifier for the alarm item. |
Version ID | The version identifier associated with the alarm item. |
TagName | The name of the tag being monitored for alarm events. |
Condition | Defines the condition that triggers the alarm. The next section of this page describes in more detail the different options for this property. |
Limit | Defines the predefined threshold for the alarm. |
Limit1 | A secondary threshold value. |
Limit2 | A tertiary threshold value. |
Disable | Enables or Disables the alarm. |
Deadband | Defines a range in which changes are ignored. |
Setpoint | The desired target value. |
Setpoint Deadband | A range around setpoint where changes are ignored. |
Group | The group to which the alarm item belongs. |
Area | The area designation for alarm management. |
Priority | Defines the priority level of the alarm. |
Aux Value | An auxiliary value associated with the alarm. |
Aux Value 2 | A secondary auxiliary value. |
Aux Value 3 | A tertiary auxiliary value. |
TemplateID | The template identifier linked with the alarm. |
Lock State | The current lock status of the alarm item. |
Lock Owner | The user or system that locked the item. |
Date Modified | The date the alarm item was last modified. |
DateCreated | The date the alarm item was created. |
X Ref Info | A Cross-reference information for the alarm. |
Comment | The comments or notes related to the alarm item. |
Message | This is the alarm message displayed to the user upon triggering the alarm. |
Alarm condition options
The Condition poperty defines the trigger for the alarm using the Limit property as the treshold value. It offers a wide range of options, the table below describes them in more detail:
Condition | Description |
|---|---|
Hi | Tag >= Limit. |
HiHi | Tag >= Limit (when acknowledged, a Hi alarm is automatically acknowledged for the same Tag). |
Lo | Tag <= Limit. |
LoLo | Tag <= Limit (when acknowledged, a Lo alarm is automatically acknowledged for the same Tag). |
Rate Of Change | The tag's rate of change >= Limit. |
Deviation Minor | Absolute value: (Tag - Setpoint) > Limit. |
Deviation Major | Absolute value: (Tag - Setpoint) > Limit. |
Equal | Tag = Limit. |
Greater Than | Tag > Limit. |
Greater Equal | Tag >= Limit. |
Less Than | Tag < Limit. |
Less Equal | Tag <= Limit. |
Changed | Tag value changed. |
Changed Up | Tag value increased. |
Changed Down | Tag value decreased. |
Not Equal | Tag different from limit. |
In this section: