Applies To:
  • CitectSCADA 7.10
  • Vijeo Citect 7.10
  • PowerLogic SCADA 7.10

After installing Service Pack 2 for v7.10 I notice that the "active subscriptions" field in the Kernel's Unit Statistics is higher.

When running a v7.10 Service Pack 2 I/O Server and mixing Service Pack 2 clients with earlier versions of Citect, it is possible to obtain duplicate subscriptions for the same tag. This is because the Service Pack 2clients provide additional subscription parameters compared to the subscriptions of the earlier clients. Although this increases the total count of subscriptions, the only consequence is that the actual list of subscriptions is larger. There is no impact on the network traffic for publishing subscription updates nor on the loading of the I/O Server or field devices. Note that the subscription count is not related to the licensing point count.

 active subscriptions