AnsweredAssumed Answered

PI Points update issue

Question asked by Arpit Champion on Apr 4, 2016
Latest reply on Jul 10, 2018 by Shubhendra

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!

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