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Table Lookup and Overwriting Pi Point

Question asked by aecaruso on Jun 26, 2018
Latest reply on Jun 27, 2018 by aecaruso

I am using a linked table and table lookup to create a pi point. The point should populate with a value every 30 seconds. If I babysit the data I can see that every 30 seconds a point is added, however, I am noticing that sometimes the last point is overwritten (once, twice, sometimes even three times). This is a problem because I am losing data frequently. Any ideas on what could be causing this? I thought it might have to do with an issue if the same value is found twice, any ways around this? My point is currently Event-triggered, it hasn't seemed like a periodic trigger has really worked much better, but I'm willing to try.

 

My analysis is as shown below:

 

The time series of my pi point is shown below. As you can see most often it will show a point every 30 seconds, but sometimes has overwritten (always when it is the same value as the previous tag).

 

 

Thanks!

Anna

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