6 Replies Latest reply on Aug 21, 2018 8:46 AM by arroyoesteban

Monitor the attributes of child elements from a parent element

arroyoesteban Aug 3, 2018 12:25 PM

Is there a way to Monitor the attributes of child elements from their parent element?

I´m interested,for instance, in creating a production line monitor where I add some Trends for some devices in the line. The production line is my parent object and the devices are my child objects.

Once my display is ready, I would like then to Switch between production lines (by using the upper bar) and automatically visualize the data for the child elements in the respective line. Is this possible?

I would like to do something similar for sections in a column.

Thanks in advance.

Best regards,

Esteban

Re: Monitor the attributes of child elements from a parent element

jjohl Aug 6, 2018 5:03 PM (in response to arroyoesteban)

Hey Esteban,

Yes this is possible. We can configure a display like this using Collections and the Asset Search filtering released in Vision 2017. By adjusting our Asset Search criteria, we can decide which child element data appears in our display based on a root parent element. I would recommend you watch the following videos to get more information:

OSIsoft: Use Collections to Create Asset-Monitoring Dashboards in PI Vision 2017 [v3.2.0.11] - YouTube

OSIsoft: Add Asset Filter Criteria and Navigation Links in PI Vision 2017 [v3.2.0.11] - YouTube

In the second video we create a dashboard showing Philadelphia and Springfield side by side, but this could also be done with the Asset Swap feature (the upper bar you mention) swapping between sites.

Let me know if you have further questions!
Jason
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- Re: Monitor the attributes of child elements from a parent element
  
  arroyoesteban Aug 10, 2018 8:23 AM (in response to jjohl)
  
  Hi Jason,
  
  Thanks for your answer. I´ll try that out!
  
  Another question:
  
  Do you know if it´s possible to configure Vision not to Display attributes if they are not specified or in case of failed calculations?
  
  I am trying to define some templates on AF for Equipment that sometimes may have an Attribute and sometimes not. I want to use the same Vision Display for both, so in case one Attribute is not specified (i.e., has no value or is not connected to a PI Point) this is simply not shown. By way of example, consider a Equipment type in which the inflow sometimes is measured in kg/h and sometimes in m3/h. I would like to have both attributes (mass flow and volumentric flow) on the General Display, but only Show the one which is specified. Thus I can Change between Equipment (drop down bar) and see how my Display automatically updates the relevant Parameters.
  
  Reading a bit I saw that for failed calculations there is a command NoOutput(), but as I don´t want to store my calculations as PI Points I did not further explore this Option.
  
  Thanks in advance.
  
  Best regards,
  Esteban
  
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  - Re: Monitor the attributes of child elements from a parent element
    
    jjohl Aug 10, 2018 4:07 PM (in response to arroyoesteban)
    
    This might be a bit tricky, but it might be possible! I'm not sure I haven't tried it. My guess is you could try the following:
    
    1. Configure an AF analysis that does some logic that outputs a single point (kg/h or m3/h) and then the Vision display will pull that. This is what you've already mentioned, and yes using our recommendation this would consume PI Points.
    
    2. In the next release, you might be able to configure something where only a certain attribute appears given a specified set of conditions. This is an enhancement request seen here: Graphics: Make visible/invisible based on tag value – Customer Feedback for OSIsoft & the PI System
    
    3. You could probably create a custom symbol that does this. I personally haven't explored much with the extensibility in PI Vision, but we have a whole course built for it if you're curious. I would recommend checking it out! Customizing PI Vision with Extensibility
    
    Let me know if that helps.
    
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    - Re: Monitor the attributes of child elements from a parent element
      
      arroyoesteban Aug 20, 2018 8:55 AM (in response to jjohl)
      
      Dear Jason,
      
      Thanks for the info!
      
      One more question about Vision:
      
      Is it be possible to pass the value of an PI AF Attribute (string) directly as URL to an Hyperlink on Vision?
      
      Following your previous advice we created a Display that show us the state of different production Units (including child elements). Now we want to add an Hyperlink to an external Website for the Units. This Website is different for every production unit visualized in the Screen. So the idea would be to store the URL as an AF ribute of every unit, read it on Vision in a control with Navigation link and directly pass it as the Hyperlink. Thus we could dynamically update the Navigation link depending on the selected unit. Thanks in advance.
      
      Esteban
      
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      - Re: Monitor the attributes of child elements from a parent element
        
        jjohl Aug 20, 2018 2:55 PM (in response to arroyoesteban)
        
        Hey Esteban,
        
        Yes. As of PI Vision 2017 R2, value and table objects will allow URL's in attributes to act as active hyperlinks. See here: AF URL attribute object in PI Vision – Customer Feedback for OSIsoft & the PI System
        
        Let me know if this is what you're looking for.
        
        Jason
        
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        Re: Monitor the attributes of child elements from a parent element
        
        arroyoesteban Aug 21, 2018 8:46 AM (in response to jjohl)
        
        Dear Jason,
        
        Perfect. That works just fine!
        
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