4 Replies Latest reply on Jul 10, 2018 8:58 AM by Shubhendra

    PI Points update issue

    Arpit

      Hi All,

       

      I have some PI Points configured that are collecting data from SCADA through OPC HDA.

      The configuration for all the tags looks okay as they are updating the way they should, but sometimes, suddenly some set of tags(not specific) stops updating without any apparent reason.

       

      I have 2 types of instrument tags mapped to my pi points, my instrument tag comprises of 2 things

      name.suffix

       

      suffix is of 2 types - .PV and .PV.1M (based on SCADA logging frequency)

       

      So, now i have 2 types of instrument tags mapped-

      1 - for some "x" tags it is - name.PV.1M

      2 - for others let's say them "y" - name.PV

       

      Now, when these tags stops updating, i perform the below steps(only for tags which are not updating)

       

      1-  Change the instrument tag name from name.PV.1M to name.PV and name.PV ones to name.PV.1M

      2- Wait for some time (roughly 15 minutes)

      3- Revert them back to their original names.

       

      After doing these changes those tags starts updating with the latest data, but i think that what i am doing is not the permanent way to resolve this, because it has happened quite a lot of times even after performing all these steps.

       

      What could be the issues causing the tags to suddenly stop updating. is there a way to workaround this?

       

      Thanks!

        • Re: PI Points update issue
          arevert

          Hi Arpit,

          What you are doing by modifying the instrument tags and reverting them back to the original ones is to make the interface to re-load these tags.

           

          Same effect could be achieved by changing the attribute scan to off and then changing it back to on (or changing any other attribute).

           

          When the tags stop updating? do you see any relevant messages in the interface logs regarding OPC server connection? In case you have identified one tag for which the issue repeats often we can increase the debugging level to include all the events received for that tag to better troubleshoot the issue.

          • Re: PI Points update issue
            rkoonce

            Hello Arpit,

             

            If the message log on the interface machine has revealed no clues, you can add the tag level debugging  that Ana mentions (/DT=tagname):

             

            Log Timestamps and Data for Tag

            Log the same items as /DB=32, but only for the point specified as the debug point (/DT=tagname). If there is no tag specified, the first point for which a value is received is set to the debug point. (/DB=64)

             

            If Ana Revert Tomas's suggestion has not proven helpful, consider a technical support call, suggest including the interface msglog (pigetmsg -st *-1d -et * >log.txt will give you the most recent 24hours) and interface diagnostics file (From ICU> Tools> Diagnostics or ( <CTRL> + D ). This might speed your resolution while protecting your proprietary information. Hopefully, the log would give some insight. Let us know if there are more details available. If you open a case with TS, we will update this thread to let people know that we are pursuing on that path.

             

            Cheers!

            Richard

            1 of 1 people found this helpful
            • Re: PI Points update issue
              alanR

              HI Arpit,

               

              Were you able to resolve the problem ? Im having a similar issue.

               

              Thanks,
              Alan

              • Re: PI Points update issue
                Shubhendra

                Hi Arpit,

                Please go through the logs as mentioned by Ana but check few more things before that.

                are those instrument tags updating on OPC side?

                that is a OPC HDA so check if data present is of good quality from OPC client tool and also if time stamp is updating fine on OPC end.

                 

                this seems to be a issue at OPC end.

                 

                Regards,

                Shubhendra