[General]EnforceTagGlobalUniqueness

The Connectivity Server manages tag subscriptions for the OPC UA Server and the Industrial Graphics Server. If a subscription request does not have a cluster explicitly defined, all the tags in the Plant SCADA system need to be unique across all clusters (in respect to both their tag name and equipment.item name) otherwise the subscription will be rejected.

When you compile a Plant SCADA project, the compiler provides a flag to the Connectivity Server indicating whether or not all tags are unique across all clusters. The Connectivity Server can refer to this flag when it encounters a tag subscription request that does not specify a cluster. If the flag indicates that all tags are globally unique, the Connectivity Server can safely broadcast a tag exists request to all clusters. If the flag indicates that this is not the case, any tag subscription requests that do not specify a cluster will be rejected.

When the [General]EnforceTagGlobalUniqueness parameter is enabled (1), the compiler will generate a warning message for each tag name that is not globally unique. These messages can be used to diagnose which tags are not unique across all clusters.

Allowable Values:

• 0 — the compiler will not generate warning messages for tags that are not unique across all clusters

• 1 — the compiler will generate warning messages for tags that are not unique across all clusters

Default Value:

0

See Also

General Parameters