Group alerts for panels with devices from more than one system

[NikolayLevchenko]

Let's say a have a panel that contains devices from multiple systems in my dist-system.

Panel works fine as long as device links include system name prefix. But when I try and generate group alerts for this panel, only the devices from the local system are included. This is consistent with this statement from Help

Since sum alerts may not contain DPs from foreign systems in distributed systems, DPs from other systems (contained in the panels of the topology) are not included in the DP list of the sum alerts of the panels (this behavior can be checked on the internal data point of type _SumAlertPanel in the alert handling config)!

I suspect that the reason for this is that internally some kind of dpConnect() is used to calculate the group alerts and dpConnect() doesn't work with multiple systems.

So the question is: is there a way to generate group alerts for a page that contains devices from multiple systems? Is there a "standard" way to do it in WinCC OA? Or do I have no other choice but to do it manually with the code?

[leoknipp]

As described in the online help it is not possible to include datapoints of different systems in a summary alert.
The summary alert is initialized when starting up the system, especially the Event Manager. In that situation the identification for distributed systems is not known and therefore resolving the dp elements would not work.

There is no standard solution available to generate a summary alert based on the information of different systems.
If you want to show a summarized alerts for different systems you can probably create an own object which makes a dpQueryConnectSingle() to the summary alert for every single system. In the work function a calculation is made to summarize the information for the distributed systems and shown at the object.

Best Regards
Leopold Knipp
Senior Support Specialist

[NikolayLevchenko]

Thanks for the answer, Leopold