I have one OPC dirver to a Funnel connection with around 13000 tags.
If I look the tags in Funnel, using Matrikon Explorer, I can see all tags with good quality, however, in Zenon, near half of those tag have INVALID, T_STD quality and I cannot read them.
I am using a diagnosis var screen to check the tags, the stranger point is if I load all tags, most of them are INVALID, other ones SPONT, but when I refresh, some of SPONT tags change to INVALID and some of INVALID ones change to SPONT...
How is this posible? How can I fix it?

I think my driver config is OK because I can read 6000 tags more or less. Is there any limitation relatet to the number of tags in the same driver or timeout...??

Thank you very much.