Displaying a X-Y trend is very slow

Discussion created by Johan_Van_Acker on Sep 21, 2011
Latest reply on Sep 23, 2011 by Johan_Van_Acker





we are working with processbook to display a X-Y trend.
The values come from a DeltaV station, these are OPCHDA data.
There's no PI server, but a PI Protocol Converter.

When displaying a X-Y trend with 2 hours history, and 8 pen it takes about 8 minutes to display the trend.
We want to be able to add/remove pen, but because of the time it takes it is nearly impossible (too slow).

Would there be a workaround, or maybe a new version of processook is able to display X-Y trend faster ?

P.S. :
Processbook version :
PI Protocol converter version : not found (?)
PI OPCHDActr version :
PI Converter Data Engine :
PI Protocol converter APS Connector (piPCAPSCtr) :




We have several ways to display a X-Y trend :


-          Intrerpolated


-          Recorded


-          Synchronized


...and actually we don’t know which one to use, each having advantages and disadvantages.


Would you have some advices ?