Configuring Analytics with PI AF Discussion Forum

RachelP in Configuring Analytics with PI AF Discussion Forum2 weeks ago (Show more)

Can an analysis reference the status of child elements' attributes?

Example: I need to do an analysis on a centralized modular solar inverter. The PI AF structure for these inverters is "Inverter\Inverter Module," where the analysis sits on the "Inverter" parent element, and the "Inverter Module" is the child element that has attributes I need to reference. Depending on the manufacturer, there are anywhere… (Show more)

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RachelP (to bbregenzer) 1 week ago (Show more Show less)

Thank you so much. These are some great ideas as to how I can get this accomplished until the filter expression on roll ups is implemented. I will definitely upvote it!

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Victor in Configuring Analytics with PI AF Discussion Forum4 weeks ago (Show more)

How can I fix this issue? Variable1: Invalid operation: [number] - [number]

I'm trying to build some analysis templates for an element template I created in PI system explorer. At the moment all I want to do is compute a basic calculation using attributes Variable 2 and Variable 3, which are all linked to a PI tag Calc The calculation I want to perform is Variable 4 = Variable 2 – Variable 3. How can I fix this… (Show more)

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Anibal_GF (to sraposo) 4 weeks ago (Show more Show less)

Yes, the input is a PI Point, the configuration string is like you said and the value type is Double. The expresion return a "Calc Failed" when there is a gap at the consulting timestamp The picture show the data in the tag PI point near "y" in the picture above. Regards.

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Arti Rajagopalan in Configuring Analytics with PI AF Discussion Forum10 months ago (Show more)

Looping through array values returned by RecordedValues function in AF Analytics

I am working on an AF Analytics calculation that requires me to loop through all the values received for a PI tag received in past 2 minutes. Depending on the data quality of the tag, the value is included/excluded in the calculation. For example: RecordedValues('dischargeIn|value','*-2m','*') expression returns 0 or more values. I want to… (Show more)

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Dan Fishman

(to TimCarmichael) 1 month ago (Show more Show less)

Glad I could help! The community has saved me dozens of hours this year!

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bjohanneck in Configuring Analytics with PI AF Discussion Forum2 months ago (Show more)

How do I check a previous PI Value for Numeric status?

I'm familiar with using BadVal(Float('Attribute')) to return a True or False as a Numeric status. I'm also familiar with using PrevVal or PrevEvent for various purposes, but I can't successfully nest PrevVal or PrevEvent with BadVal. I'm looking for something like this... PrevEvent('Attribute',BadVal(Float('Attribute')),'*')

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bjohanneck (to LalBabuShaik) 2 months ago (Show more Show less)

Excellent, this was my first use of arrays and this solution worked well. Thanks for the detailed explanation and screenshots Lal, I solved my problem and have a better understanding. I appreciate your help.

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bjohanneck in Configuring Analytics with PI AF Discussion Forum2 months ago (Show more)

Nested PrevVal Not Returning Data When Data Exists

I'm building an Analysis Template and I have a PrevVal('Attribute Name','*') variable that is returning the correct Value at Evaluation, whereas I have two subsequent problematic variables: PrevVal('Attribute Name',PrevVal('Attribute Name','*')) returns No Data PrevVal('Attribute Name',PrevVal('Attribute Name',PrevVal('Attribute… (Show more)

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bjohanneck (to totsengue) 2 months ago (Show more Show less)

Thank you Lal and Thonya! Nesting PrevEvent inside of PrevVal worked & makes sense. I was missing that I needed to combine the two. I appreciate your help.

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bjohanneck in Configuring Analytics with PI AF Discussion Forum2 months ago (Show more)

Selecting Specific Time Interval for Analysis Variables

When making an analysis template - how do I specify a time to check a specific PI Value? Similar question for checking Questionable flags. I have 30 minute data (4 to 6 different values, once every 30 minutes), and in my analysis I need to check numerous things...some of those things being values (or their Questionable flags) at the present… (Show more)

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bjohanneck (to totsengue) 2 months ago (Show more Show less)

Alright I got there using PrevEvent and PrevVal, and nesting them as necessary. Now I see that... PrevEvent('Attribute Name','*') returns the time of the previous event, PrevEvent('Attribute Name',PrevEvent('Attribute Name','*')) returns the time of the event two prior and so on. Interestingly though I now have a new question...I'll start…

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Trish in Configuring Analytics with PI AF Discussion Forum3 months ago (Show more)

I'm trying to launch my Cloud class environment but am getting ssoadfsbe.osisoft.com refused to connect...not sure what's wrong.

No details, just the message after I click Launch:

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totsengue (to Trish) 3 months ago (Show more Show less)

Hi Trish, Do you mind sending me screenshots of your analysis so i can confirm a few things before we opt for the upgrade (you don't have to post it here, you can email them to me if they have proprietary information). Thanks, Thonya

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Trish in Configuring Analytics with PI AF Discussion Forum3 months ago (Show more)

Configuring Analytics with Pi AF class - problem with output variables

I've just completed the first class exercise where the creation of an analysis is required. I've done the work but when I look at the attributes tab on the HOU.Press.01 element, the new attributes that were mapped from the variables in the exercise are showing as Pi Point not found. The example shows the output of the variables. When I right… (Show more)

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Trish (to gkhairallah) 3 months ago (Show more Show less)

Georges, It’s not permissions – I clicked on red Exclamation warning icon on the OEE Measurements analysis on Friday afternoon and got the below (it’s indicating that the analysis is looking for these points in the wrong database even though the attribute is getting data from the right one – see second little screen capture below this one): …

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SwapnilEquinox in Configuring Analytics with PI AF Discussion Forum3 months ago (Show more)

I have access to cloud environment and I have loaded this example kit as well.The points in the attributes do not simulate. They are in "Pt Created" status. Please help.

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SwapnilEquinox (to LalBabuShaik) 3 months ago (Show more Show less)

Thanks Lal Babu, you are always there for rescue. I was just taking up this exercise and I had forgotten to Enable the analyses, which I realized after your reply. Yes all of the analyses have started running incl the 'Gas Gravity Avg' as directed in the exercise. However there is one particular 'Production Rate' which still shows "PtCreated". the…

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tommm in Configuring Analytics with PI AF Discussion Forum7 months ago (Show more)

Variable1: Invalid operation: [number] + [number]

I'm trying to build some analysis templates for an element template I created in PI system explorer. At the moment all I want to do is compute a basic calculation using attributes Acetylene, Ethylene and Methane, which are all linked to a PI tag. The calculation I want to perform is Variable1 = 'Acetylene' + 'Methane'. The error message in the… (Show more)

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bdeslatte (to tommm) 5 months ago (Show more Show less)

I know this is old, but probably better to use TagBad or BadVal rather than IsSet for tag data validation. For instance, IsSet('MyNewAttrTag', "q") would not detect states like Pt Created or IO Timeout.

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