1 Reply Latest reply on Apr 19, 2017 3:14 PM by gregor

    PI TAGS Creation: Automatic (AF) or not ?


      We want to model our high voltage electrical equipment in PI Osisoft. We have +/- 250,000 electrical equipment’s of all kinds (transformers, circuit breakers, disconnectors,)
      and also measuring instruments (gas probe, C2H2, CO, ...) which are installed on the equipment.


      The project is still under study. We created an asset model in AF. We have created templates for each type of equipment we have. So to create the elements in AF,
      we always go through the instantiation of a template. The problem is that for the same type of equipment, the number of measuring points can change.

      During the life of the equipment, probes may be added or removed.


      Example: The first 3 years of the power
      transformer A, it has a probe that measures the CO and from the 4th year, the probe is moved to a transformer B and transformer C will never have CO probe.


      In AF: A, B and C have a tag for the CO (2 tags) whereas in reality there is only one probe installed first on A then on B and never on C.


      Now, each type equipment’s has all possible tags.



      To create more finely the tags on our elements (AF) we see two solutions

      1) Write a program that instantiates the template (ex transformer) and creates the tags on an "on demand" basis for each element.

      2) Use the "Tag creation" option that creates the tag automatically at the template instantiation and then delete (software) the unused tags.


      What is thebest solution?

      Do you seeany other solutions?


      Thank you for your help

        • Re: PI TAGS Creation: Automatic (AF) or not ?

          Hello Denis,


          The answer mainly depends on the workflow you identify as the most efficient on to maintain PI Points and their asset assignment. It may as well be of interest, what data source(s) are feeding the PI Points with data and if this happens on the PI Point level or the Asset level. How is the sensor data exposed and what connectivity / protocol is used to read the sensor data into PI.


          If you are able to identify those measurements that always exist for assets of the same type, it could be wise to have those with the templates with the "Tag creation" option checked and to allow extensions for those reading that are specific for a particular piece of equipment.


          Whatever strategy you decide for, there's obviously some maintenance work included. Besides using PI System Explorer (PSE) for maintaining assignments of PI Points to AF Attributes, you may find it pretty useful to use the PI Builder add-in for Excel.