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Subject		Author
	Performance issue with PrevEvent in AF Analysis 3 days ago	by JanWortmann
	PI AF Event Frame won't close 6 days ago	by AGaribaldi
	PI SMT timezone 1 month ago	by RupeshACC
	How do I find the sum of values (not integrals) of a tag over a period of time? 1 month ago	by WeilunWong
	Dev & Test Environment 1 month ago	by dolivares

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JanWortmann in PI Server5 days ago (Show more Show less)

Performance issue with PrevEvent in AF Analysis

Hi! For a comparison of continuous data with lab data (both as PI Tags) I need to find the last 5 events of the lab data. I choose a nested PrevEvent()-Function. The result is what I expect but the evaluation time is to big. Especially as a start of a evaluation chain. The output attributes are already set to DR None. Has anyone an idea… (Show more Show less)

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sraposo (to JanWortmann) 3 days ago (Show more Show less)

I had forgotten that the Analysis DR doesn't support these array functions. It's mention here: https://customers.osisoft.com/s/knowledgearticle?knowledgeArticleUrl=KB01586 The reason is that these calculation can be expensive. The Analysis DR is calculated client side, as opposed to server side. In other words, it could cause some performance…

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weiwei.zhan in PI Server5 days ago (Show more Show less)

How can I get a PI-Server trial

I need to develop a Java program to connect to PI-Server for testing. But I can't find any link to download a trial. How can I get a trial? Thank you very much?

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weiwei.zhan (to jyi) 5 days ago (Show more Show less)

Thank you!

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AGaribaldi in PI Server1 week ago (Show more Show less)

PI AF Event Frame won't close

Hello, I was receiving an email alert for a PI AF event frame. When i checked in process book the condition should not have been met. I evaluated the event frame in AF and it was false. There is no end criteria. The same template fired separate event frames that opened and closed properly. This other event frames occurred about an hour before… (Show more Show less)

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sraposo (to AGaribaldi) 6 days ago (Show more Show less)

Another possibility is that the closing event was received out of order. What interface is writing to the input PI Point? Is it possible the data is coming in out of order?

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tinklerj in PI Server10 months ago (Show more Show less)

Splitting a PI system into two

I have done a fair bit of merging PI systems, but now I am faced with splitting one system (53,000 tags) into two systems of approx 20,000 and 5,000 tags respectively (non-overlapping). The 28,000 surplus tags are being retired. The key point is that the archive files on each new system must not contain any data associated with tags on the other… (Show more Show less)

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Roger Palmen (to tinklerj) 7 days ago (Show more Show less)

Option 3: Use PI2PI to send the data to the new PI Archives. You can control the date ranges and point ranges to control the load on the source system.

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LuanSandes in PI Server2 weeks ago (Show more Show less)

How much data is cached in the analysis service cache?

I previously thought the amount of data in the analysis service cache was governed by the following parameters: MinCacheEventsPerAttribute MaxCacheEventsPerAttribute CacheTimeSpanInMinutes But I found the following excerpt in KB01495: Starting in 2.9.0, the service dynamically determines how much cached data each attribute needs based upon… (Show more Show less)

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sraposo (to LuanSandes) 2 weeks ago (Show more Show less)

Yep that's correct! If you haven't read our best practice article I'd recommend reading it: https://customers.osisoft.com/s/knowledgearticle?knowledgeArticleUrl=KB01641 I also have some more in depth blog posts about best practices if you look at the content I've posted. Thanks, Seb

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DiegoFabri in PI Server3 years ago (Show more Show less)

PI Formula - Disregarding the first 2 seconds of an Event Frame

Hi! I have an Event Frame, triggered by an Analysis Expression, which indicates the operation of an equipment. The implemented equation identifies the start and the end time of the equipment operation. This EF Template have an attribute called "Operation Current - Average". But I have a problem to calculate this attribute: this current needs to… (Show more Show less)

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bbregenzer (to DiegoFabri) 2 weeks ago (Show more Show less)

After a few years of enhancements, I think this could be more easily addressed using event frame analysis output expressions; something like: TagAvg('Pressure',EventFrame("StartTime")+2,EventFrame("EndTime")). Please see this KB Article for further details:…

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LuanSandes in PI Server2 weeks ago (Show more Show less)

Are formula data references cached by the analysis service?

In the past, I've dealt with stability issues in the analysis service (over 10k analyses with the following configuration). I've been told not to use attributes with formula data reference in analyses. The rationale was that these attributes are not cached by the analysis service. Therefore, every time the analysis trigger, PI would have to… (Show more Show less)

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LuanSandes (to sraposo) 2 weeks ago (Show more Show less)

Thanks Sebastien! From what I understood, the issue with analysis service performance is not related to formula or analysis DR. It is related to the use of attributes that do not support AFDataPipe.

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m.tiando in PI Server4 months ago (Show more Show less)

PI HA Server Installation Path Registry - Registry Key Empty on The Secondary Server

I have a problem when I want to re-initialize secondary server from collective manager on primary server with error messages as below I've checked the Installation Path registry setting on the server was filled with D:\Program Files\PI (which is same with the installation path registry on the primary server) I've tried to changes the path… (Show more Show less)

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jyi (to Shyamlal) 4 weeks ago (Show more Show less)

Checking ports can be done by telnet or Test-NetConnection in PowerShell cmd: telnet <Secondary> 445 powershell: Test-NetConnection -ComputerName <Secondary> -Port 445

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Kevin-Mac in PI Server1 month ago (Show more Show less)

Is it possible to rename PI tags using PI builder

I can rename PI tags using PI SMT. I have a number that I need to rename, so I am wondering if it is possible to rename using the PI builder add in to Excel?

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Boost01 (to Kevin-Mac) 1 month ago (Show more Show less)

Hi Kevin, Yes it is possible. After the first PI tag search box you will be presented with the tag attributes to display. One of those is "newName". Kevin

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RupeshACC in PI Server1 month ago (Show more Show less)

PI SMT timezone

Hello, If go to SMT--> View--> Setting --> Time format, I can see the different times on it, Please see the below image. On other Collective member, it is working fine. Does any one have idea about it?

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

Hello all, This is also causing, Primary and Secondary Archive data time mismatches if i open archive data on secondary. 1. if i open SMT--> archive data on primary PI server, and i connect Primary as well as secondary, it shows correct data with correct timestamp in secondary. which is sync with Primary data Primary server- and connected…

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