Setting up events

[oley]

Hi,

I’m trying to define the most reasonable configuration of events for the channels.
I have a few observations from my attempts so far.
I already have about 20 objects in the system, each of which operates on over 200 channels. When a device restarts, or when communication is lost and then restored, I receive a flood of “Defined” events, which fill up the entire events window in the app and prevent me from going back to other events. How can I disable this type of event?
Even without this behavior, the event window only displays the last 100 events, which is often insufficient. Question: Is there a way to reconfigure this and increase that number?
What exactly is the difference between “channel data” and “channel value” has changed?

[manjey73]

Channel data – value or status

<Option name=”EventCount” value=”100″ />

in ScadaWebConfig.xml

[oley]

Hi,

thank you.

Is it possible to trigger an event only for selected status values?
Am I correct in understanding that enabling “channel data has changed” has exactly the same effect as enabling both “channel value has changed” and “channel status has changed” together?

[manjey73]

Yes, you can only enable “Status changed”
and, depending on the destination, use monitoring and status change in the second part of the input formula.
Channel formula : status formula

[manjey73]

For example, you get a value from the Communicator that needs to be handled differently from the channel boundaries. The status in the normal state will always be =1, you use control based on other criteria and change the status to your own, respectively, adjust the status mask for displaying and controlling output to Events.

[oley]

Thanks, could you give a simple example of this status formula?
For example: I’m setting up an event for the channel as “status has changed”, but I only want to log it when status == Error (id=23).

[manjey73]

Then you will most likely need settlement channels. Because otherwise you will register all statuses, not only =23. As far as I understand, events do not have filtration

[manjey73]

That is, in the billing channel, you will always have either status 1 or 23, for example, and there will be fewer events.

[Mikhail]

Hi,

When a device restarts, or when communication is lost and then restored, I receive a flood of “Defined” events

If the “Channel is undefined” checkbox is not set in the channel’s event filter, I expect that such Defined/Undefined events should not be generated. Could you check please?

[oley]

Hi,

it happened for channels with “Channel status has changed” bit set.
For all those channels after connection break I see in events table:

27/07/2026 11:31:33 EFO CHOCIMINO EFO CHOCIMINO inverter #9 Temperatura wewnętrzna Defined, 33.600 °C

I will disable this event.

[Author]

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