What is Polling on Use? What's the advantage of applying this feature?

"Polling on Use" means that values are then polled from the peripherals only when the values are used, e.g. when a user interface has to display the values or when a control manager is connected to that value.

"Polling on Use" leads to a reduction of the communication load between PLC and driver. When using "Polling on Use" values are only polled when a connection to the data point element has been established by a dpConnect or a QueryConnect. If no dpConnect is active for a certain data point element (no corresponding panel is open), polling for this data point is not executed.

This feature is only supported by the WinCC OA drivers: IEC61850, S7, S7+

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