Hi,
I am working in Perspective 8.3.4 and I am experiencing issues with the sampling time of a trend. As shown in the image, the trend is not fast enough to display the setpoint position properly. How can I increase this speed? The SQL Historian seems to be the issue.
This could be a few things.
Is the tag history configured with adequate settings such as minimum time between samples etc. Also, I find setting the deadband style to discrete works better then setting analog when the value doesnt change often.
The resolution of the tag history query. If you are using aggregated points you want to make sure you have the appropriate return size so that you dont aggregate cross the span (such as 900 points for 1second resolution over a 15min span)
It could also be limited based on your tag update rates which is controlled by the type of driver in use to collect this data and the tag group setting, such as mode, rate and opc settings.
To confrim where the issue could be i would start by quering the history as stored to see what resolution the data is stored at.