Make project tags available in OPC UA Server

By default and for security reasons, project tags are not made available to OPC UA clients until you make them so, regardless of how you have configured the OPC UA server to run in your project. You must specifically select the tags in the Project Tags datasheet and then set the necessary tag property.

You can perform this task at any time — for example, as you create your project tags — but keep in mind that you also need to configure the communication settings and runtime task for OPC UA Server before you actually run your project.

To make project tags available in OPC UA Server:

1. In the Global tab of the Project Explorer, expand the Project Tags folder and then double-click Datasheet View.

   The Project Tags datasheet is displayed.

   

2. For each project tag that you want to make available to OPC UA clients, select the appropriate option in the UA External Availability column.

   Option	Description
   Disabled	The project tag is not available to OPC UA clients. (This option is selected by default for all new tags.)
   Read Only	OPC UA clients can subscribe to and read the value of the project tag.
   Read/Write	OPC UA clients can subscribe to, read, and write the value of the project tag.

Changes to the project tags are saved immediately; you do not need to close the Project Tags datasheet.

For more information, see Set tag properties using the Project Tags datasheet.