I have a PI-tag that collect all alarms of PLC/WinCC and need to do some analytics on it.
Tag value looks like this and has a lot of changed values:
@LOCALMACHINE::WAZI\ALGEMEEN_WAZI/SMS/BIOLOGIE|Process message|Process message|15007|64|-BIO- aktieve PH sonde < PH laag parameter||ENABLED|NOT ACTIVE|ACKED|NOACKREQD|192|WAZI|ALGEMEEN_WAZI/SMS/BIOLOGIE|Process message class|Process message|1||809100
I was already able to collect the needed values/statuses from the big string into PI AF attributes.
What I want to do now is to count how many alarms we had over an certain time. Made a new attribute(boolean) that indicates if it is a new alarm (active and not Acknowledged)
And then use this expression NumOfChanges('NewAlarm','*-24h','*')/2
But think there must be a better way?
But the biggest problem is that I want a count of the different alarms.
For example we have 6 alarms in the last hour 3x alarm1 2x alarm2 en 1x alarm3
Don't know how to start with this.
Do I need to create an array and then do some calculation on it? Or is there an other way?
Anyone experience with this?
