how they work: Events, Alarms and Limits

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  • #1214
    inpelsainpelsa
    Participant

    I can’t find any documentation about this for scada administrator so… questions! Channel columns meaning and use:

    – WRITE EVENTS: means write to the events data file? if not… they are shown today but not saved? Not sure what it is for.

    – EVENT SOUND: will it play some sound on server? on clients table view? on a scheme?

    – EVENT ON CHANGE: on change depending on limits? (which limits are aplicable?) any change respecting last data?

    – EVENT ON UNDEFINED: when is it undefined? no comm data received? after some time? (I think I remember a relationed parameter but don’t remember where is it)

    – LOWER/UPPER LIMIT: what’s the utility of those limits?
    – LOWER/UPPER ALARM: Event generates if below/above this limits?

    Object and device fields… are needed for something?

    Thanks and happy weekend!

    #1215
    inpelsainpelsa
    Participant

    Are any events shown when in Report/List Chart view?

    #1217
    MikhailMikhail
    Moderator

    WRITE EVENTS: if false, no event for the channel will be written and shown.
    EVENT SOUND: plays beep in browser. Just try.
    EVENT ON CHANGE: on any change. Usually the option is used for discrete values.
    EVENT ON UNDEFINED: e.g. connection is lost. Event fires when the channel status is 0.
    LIMIT: I recommend trying it using SCADA-Server generator.
    Object field is optional. Device field is required if channel value is measured by a device.

    Are any events shown when in Report/List Chart view?

    Sorry, I didn’t catch the meaning.

    Have a nice weekend too 🙂

    #1225
    inpelsainpelsa
    Participant

    WRITE EVENTS… is like “Events enabled” ? I think ‘events enabled’ is more understandable.

    AVERAGING: how does averaging work? continuos average? last 100 values average? last minute average?

    By the way… as only minute-data is shown… what happens when communicator sends several values on the same minute? does an average? maximum? latest?

    Limits… I will try to guess it but that’s not an answer.

    > Are any events shown when in Report/List Chart view?
    > Sorry, I didn’t catch the meaning.
    When in a report view with some list chart graphs there are no Events shown. Useless? => hide it, makes you think there are no events.

    #1242
    MikhailMikhail
    Moderator

    I agree, “events enabled” is better.

    Averaging:
    Received values are summarized within a period (minute or hour) then divided by their count and the result is stored to archive.

    Events:
    In the new web app the chart list will use the common page template, so events will be visible. Thanks, recently I thought whether it is required or not.

    #1269
    inpelsainpelsa
    Participant

    Just one doubt more…

    As nothing is 100% reliable and this test-wireless link even less… I get some events displayed as: Normal after a loss of link (maybe 3 times a day, but with 100 channels…)

    Is there any option to avoid/ignore NORMAL events caused by a communication error?

    Thanks!

    #1270
    MikhailMikhail
    Moderator

    Hi,
    Uncheck Event on undefined checkbox for these channels.

    #1271
    inpelsainpelsa
    Participant

    Hehehehe… I already understood that column…

    Event appears and checkbox is NOT checked!

    #1274
    MikhailMikhail
    Moderator

    Do limits are set for those channels?

    #1275
    inpelsainpelsa
    Participant

    http://s32.postimg.org/9fkw5rf5h/.jpg

    Yes, there are limits. Any way to avoid those Normal ?

    • This reply was modified 5 years, 3 months ago by inpelsainpelsa.
    • This reply was modified 5 years, 3 months ago by inpelsainpelsa.
    • This reply was modified 5 years, 3 months ago by inpelsainpelsa.
    #1279
    MikhailMikhail
    Moderator

    Something wrong with the image.
    It requires changes in SCADA-Server logic. The changes may be done within a common queue of tasks or may be done fast for a fee.

    As a workaround, limits can be implemented using formulas, but in this case you need separate channels for alarm signalling.

    #1280
    inpelsainpelsa
    Participant

    I tried several times to link image, after 5 minutes i leaved it out, anyway you got it.

    Leave the task for the queue,it’s time to make link reliable!!

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