2 Replies Latest reply on Sep 28, 2009 2:25 PM by spilon

    Create a Tag that archives values at particular times of day

    fraser

      Hi all,

       

      Just a quick one as I can't find the article in support that gives a method of doing this.  I remember seeing one in support - but cannot use search keywords to find it!  (when are all those support docuemnts going to have a nice search engine by the way!)

       

      What is the best method for setting up a tag to actually archive a value at a specific time - say get value at 6:00 am and 6:00pm exactly.

       

      Cheers

       

      Fraser

        • Re: Create a Tag that archives values at particular times of day
          andreas

          Fraser,

           

          don't know what article you have read - but you can create a PE that is scheduled /f=12:00:00,06:00:00 - this will be calculated at 6am and 6pm. Given that the PE is not too bussy and you switch of exception and compression you should get the value at 06:00:00.

           

          Regards,

            • Re: Create a Tag that archives values at particular times of day

              Andreas

              don't know what article you have read

               

              Just to add to Andreas' answer, you can find more information in the "PI Performance Equations Scheduler" chapter of the PI Server Applications User Guide, available on the vCampus Library.

               

              Andreas

              but you can create a PE that is scheduled /f=12:00:00,06:00:00

               

              For the benefit of newer PI users, this is called a "scan class" and is defined in the PI Performance Equations Scheduler's startup file - generally using PI Interface Configuration Utility (ICU) directly on the PI Server.

               

              Andreas

              Given that the PE is not too bussy and you switch of exception and compression you should get the value at 06:00:00

               

              Note that you can optimize the way PE performs calculations in a different ways, such as running several instances of PE in parralel.

               

               

               

              For more information on all of the above, I invite you to consult the PI Server Applications User Guide and don't hesitate to contact our Technical Support team, the best resource for non-programming questions.