When i am deleting and again adding bad and stale points , new points added show 'Pt created' as current value. What may cause such an issue and Does every time we add or delete a pi point we need to restart the Interface service??
"Pt Created" is a system digital state written to PI tag whenever it is created. You don't need to restart interface whenever you are adding or deleting PI Points. Points updates will be picked by Interface automatically. If you point shows "Pt Created" for long time meaning it is not receiving any updates and would request you to check the source i.e. instrument tag and location 1, 4.
I have check the attributes for location 1 and 4 , they seem to be alright . Ours is a Rockwell FT historian server which is basically a PI server . When i added the tags using FT administrative console and each time after adding and deleting the tags i had restarted the PI interface services then values started coming. Can anyone explain this behaviour??
This behaviour is not expected. When you add new tag to a interface, it is expected that the tags will receive the values from the source in next scan cycle. Depending on the scan time there will be a delay in getting the values from the source.
When you restart an interface after adding the tags, it gets the latest values for all the configured tags from the source so you will be able to see the values immediately.
Well the problem seems to be sorted out by first deleting the bad or stale tags using PI builder and restarting the Interface services from PI ICU , then again adding the deleted tags using FT Administrative console and restarting the interface services from PI ICU , the values started coming into the PI system. Also when we deleted and added the point without starting the interface services the values were not coming.
It is important to note that previously we were adding the point using FT View Studio whereas Rockwell recommends to use FT Administrative console for adding new PI points.
Strange behavior this, because we have using the same system for the past 1 year and we have always successfully added new point from FT View Studio without restarting interface services. can someone explain why the system is behaving like this??
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