Many engineers assume the standby node sits idle. The standby node actively polls all PLCs at the same rate as the active node to maintain current values. This doubles the load on your industrial network. If you have 100 PLCs, each polled 10x/sec, the standby node adds another 1000 polls/sec. Ensure your network switches can handle it.
Which are currently supported for the latest version? kepserver enterprise vs kepserverex
is the industry workhorse. It is a single-server, monolithic OPC server designed for machine-to-machine (M2M) communication at the edge or in a small-to-medium control room. Many engineers assume the standby node sits idle
: Integrated into Rockwell’s TechConnect support ecosystem. If your plant is a "Rockwell shop," this allows you to have a single point of contact for both your SCADA software and your connectivity layer. A Note on the Future: Kepware Server 7 If you have 100 PLCs, each polled 10x/sec,
While Kepware unofficially supports up to 100,000 tags, real-world performance degrades past 50,000 tags if you are using advanced features (Alarms & Events, Historical Logging, or 20+ concurrent OPC UA clients). Beyond that, you should split the plant into multiple EX instances or upgrade to Enterprise.
Here’s a clear, concise text you can use for a comparison, FAQ, or internal documentation.