For a device or entity to automatically perform an action when the value of a data
point changes, you can create a rule in Security Center.
Before you begin
- Add your device.
- Add data points to your devices and entities.
Best Practice: For optimal performance of the plugin, it is
recommended to limit the number of data points and rules to 5000
respectively.
Procedure
-
From the Config Tool homepage, open the Plugins
task.
-
From the entity browser, select the Industrial IoT plugin role and click the
Rules tab.
-
In the Rules section, click Add a
rule (
).
-
In the Information section, enter a name and
description.
-
In the Conditions section, select On data
change from the Condition list and
provide the following information:
- Select a source type
- Select whether the rule applies to a device, device type, entity, or
entity type. Selecting a device or entity type means that the rule
applies to all devices or entities that inherit the properties of
that type.
- Select a source
- Based on the selected source type, select a specific device, device
type, entity, or entity type to which the rule applies.
- Select a data point
- Select the data point that the rule applies to.
- Select an operator
- Select the operator and the value used to evaluate the data
point.
- Always trigger
- If selected, the actions are executed each time the data point value
changes and the condition involving the data point is true. If it is
not selected, the actions are executed if the condition is true for
the current data point value change and it was false for the
previous data point value change.
-
In the Actions section, select
the action that you want to occur when the condition is met.
The action can be one of the following:
- Raise an event
- Raise the custom event you select.
- Trigger an alarm
- Trigger the alarm that you select.
Select the
Auto-acknowledge option if you want
the system to automatically acknowledge the alarm when the
condition that triggered the rule is no longer true.
- Change the state
- Change the state of the device to the state you select.
- Write on a data point
- Write a specified value to the data point you select.
-
(Optional) To add more actions to the rule, click Add
action (
) and configure the action.
-
(Optional) To duplicate a rule, right-click on the rule and select
Duplicate.
-
Click Apply.
Results
The rule is enabled by default. To disable the rule, move
the slider to OFF.
Example
If you have a temperature controller device configured in a room, you can create a
rule to change the state of the device to
Hot and trigger the
Too hot
event when the temperature reaches 22 degrees or higher.