SIMATIC WinCC Open Architecture Forum

Hi there,

I have the following question:
Is it possible to create an alert which comes into alert-state when two other alerts are active?
E.g. On a station there are two groups of emergency-lights. Each groep reports a failure and this is shown with an alert.
In the situation that both groups fail at the same time, a higher priority-alert should be reoprted stating that the complete emergency-lightinh has failed.

Using a sum-alert for this will generate en alert when one of the alerts is active, not only when both are active (or I have missed some config possibility :unsure: )
Are there any other configs possible for this or do I have to create a script which connects to the individual alerts and then sets the combined alert..?

Thanks for reading and hopefully, coming up with a solution...

With regards,
Martijn

Hi Martjin,

There is no possible parametrization of an alert to be triggered by an AND combination of other alerts.
The only way to do this is to create a new boolean (with an alert config) that is set by an AND combination of other booleans.
You could do this either by scripting or usind dp-functions (but in terms of performance this is only recommended if you don't do it with a huge amount of datapoints in your system)

br
Sebastian

Could you not do this by using an alert setting with a "Threshold filter" enabled for SumAlerts. The individual alerts would still be generated in the background but would not be displayed to the end user unless both have been activated at the same time in your case.

Hello,

the threshold-filter at summary alerts does not avoid that the summary alert is generated while the number of defined alerts is not reached.
At the AEScreen you can define that you want to use "automatic alert-filtering". If this function is activated you'll only see the summary-alert and not all single-alerts when the defined threshold is reached.

Best Regards
Leopold Knipp
Senior Support Specialist