Problem with trends

Anonymous user · ‎2021-12-27

Good day.

When i try to build a trend of an analog point (point value changes very slowly, 1 change in 1-2 days) and when i use ruler on my trend the current value shown as unidentified.
how can i fix this problem.

Thanks

BevanWeiss · ‎2021-12-27

You might need to provide a screenshot of this. It's not ringing any bells for me having seen it before.

If you could also tell us what configuration your trend line has (because I suspect when you send the screenshot it's going to say 'Processed Historic', so you should tell us what algorithm, resample interval etc you have configured).

If it's configured as a 'Raw Historic' and you don't have a sample within the time window being displayed, then I could somewhat understand this (although it would be nice if ViewX would display the closest data point available)..

Lead Control Systems Engineer for Alliance Automation (VIC).
All opinions are my own and do not represent the opinions or policies of my employer, or of my cat..

geoffpatton · ‎2022-01-03

Usually when I have very little values going into history it is because I need to set the Significant Change on the Analog Point tab. I use Absolute and then whatever value is applicable. Sometimes the value that i need to use creates to many Historic records but it is desired for other things, so then I have to setup Compression on the Historic tab.