To monitor the data points of an HTTP device or entity, you must add them to the
device or entity in Security Center.
Before you begin
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.
-
In the entity browser, select the Industrial IoT role
and click on the Devices tab.
-
Select the HTTP device from the Devices list.
-
In the Data points section of the device, click
Add a data point (
)
The
Add a data point dialog box opens.
-
Enter the following information:
- Name
- The name of the data point.
- JSON path
- The JSON path that will be used to extract the value from the JSON
payload in regards to the data point.
If the data point value does
not appear within a JSON payload sent to the plugin with the
correct device ID, then the data point value will not be
updated.
- Value type
- The type of information reported by the input (data point).
- Access level
- Indicates whether the selected data point is read-only or
read-write. This field is automatically displayed by the plugin
role.
- Conversion
- The conversion to be applied to the argument.
- Unit name
- (Optional) The measurement unit of the data point.
- Unit symbol
- (Optional) The symbol representing the measurement unit.
-
Click Add to add another data point or click
Add and Close.
The data point is displayed in the Data points
section.
-
(Optional) To duplicate a data point, right-click on the data point and select
Duplicate.
-
(Optional) To deactivate a data point, right-click on the data point and select
Deactivate.
-
Click Apply.