How many historical trend display points can be viewed in the SMARTDAC+ GX/GP series' web browser?

3600 points worth of data can be displayed. When the sampling interval is 1 second, 1 hour's worth can be displayed.

For details, see the user's manual (IM 04L51B01-01EN)
◊3.1.4 "Monitoring the GX/GP Data."
User's Manual (IM 04L51B01-01EN)