Question:
In an application designed to communicate with 1500 OPC tags, which of the following is the best option for the OPC client: several OPC groups with fewer tags (for example, five groups with 300 tags each), or one single group with 1500 tags?
Solution:
In this case, you should use only one OPC group. The only advantages in having several OPC groups in the application is being able to have independent control on the group (Scan, Enable, DeadBand properties) and having different update times, since multiple OP groups mean more memory being consumed by the OPC Client and OPC Server and more communication links when starting/activating or stopping/deactivating application objects.
