OPC UA Server

Configure the Open Platform Communications Unified Architecture (OPC UA) Server.

OPC UA enables secure access to a high volume of data using an industry standard protocol. Data can be represented in multiple forms. The simplest form presents Individual scalar data items with folders for data scopes, structure, and array element. Using this form, all data available to FactoryTalk Linx, the FactoryTalk Linx OPC UA Connector and the FactoryTalk Live Data OPC DA interface is fully available. By creating tag lists, only selected structures, arrays, and complex types are presented using the definitions derived from Logix controllers. Finally, with a custom namespace, selected control system data can be reorganized to new layouts and naming conventions. FactoryTalk Linx Gateway supports 100 OPC UA client connections. But the actual capacity for OPC UA client connections could vary based on available computer resources and the amount of information being requested. The Logix controller’s OPC UA tag access setting is used for its embedded OPC UA server and does not apply to tags delivered by FactoryTalk Linx Gateway. Use the FactoryTalk Linx Gateway OPC UA Tag list option to limit which tags OPC UA clients can access. When FactoryTalk Linx Gateway delivers structures and arrays data, the number of defined elements may require the Logix controller to split the data into separate packets. However, FactoryTalk Linx Gateway will wait to receive all of the data before sending the entire array to an OPC UA client.

Field	Description
Disabled or Enabled	Controls the OPC UA service and view the status.
Service Name	Sets the OPC UA service name visible to OPC UA clients.
Enable certificate management by FactoryTalk Policy Manager	Specifies whether to use FactoryTalk® Policy Manager to manage certificates with the OPC UA Server. When it is selected, Outgoing Certificate will be disabled. It only works when the endpoint is configured with both the Basic256Sha256 Sign and Encrypt security policy and FactoryTalk Security User authentication. After the certificates are deployed by FactoryTalk Policy Manager , you must restart the OPC UA Server manually to adopt the new certificate. IMPORTANT: FactoryTalk Policy Manager must be version 6.60.00 or later.
Namespace	Determines how the OPC UA service will present information to OPC UA clients. Folders with scalar data Allows OPC UA clients to access all data as scalar from all FactoryTalk application sources. Tag list and structures/array access Controls which FactoryTalk Application data are accessible to specific OPC UA clients and to access complex types using structures (Logix UDTs) and arrays. When selected, OPC UA clients will be limited to the items in the group on UA Tag List . Custom namespace Permits the creation of user defined structures and tags within FactoryTalk Linx Gateway and assigns these definitions to tag data from FactoryTalk application data sources. This allows you to reorganize the underlying information to support a different naming convention often required to support OPC UA companion data models. For more information, see Custom UA Namespace. In some rare cases, the tag values may not be refreshed. Restart FactoryTalk Linx Gateway Supervisor in Task Manager .
Discovery service URL	Lists the URL of the OPC UA Local Discovery Service.
Register with Discovery Service	Sets whether the OPC UA service is broadcast as part of the OPC UA Local Discovery Service.