Does anyone have experience with application with many datapoint functions

[fmulder]

We are facing an application that will probably have 150.000 physical I/O values being read by a bunch of PLC's. Eventually all these values will end up on a scada screen.
We will need to optimize the communication to the PLC so that we reach the desired update times.

Our PLC (1500 series) will be using the S7+ protocol. This means that we have the following options to reach an optimal communication response:

* Use subscriptions
* 'Pack' the bits into (d)words and use dp functions to extract the bits from the word into dp elements

Does anyone have experience with a WinCC Oa database, running on one server, with (lets say) 200.000 dp functions ?? (Please note that only a low amount of signals will actually change. I'd expect a small amount of changes per second. We have smoothing and time-delays in the PLC's)

Thanks for your answer

share the fun
Frenk Mulder

[leoknipp]

A dp function itself is similar to a dpConnect.
As long as the input signals are not changing they are not causing any load. A high number of dp functions will only increase the memory usage of the Event Manager.

Best Regards
Leopold Knipp
Senior Support Specialist