I have set up three float tags and made them historical. I then trend the values in a chart. Everything works well for anywhere between 1 - 2 hours, and then the tag values freeze. There are no errors, and the tag overlays show the tag values as good. When I log into the controller with logix5000 however, I can see that the actual tag values have changed. To fix this, I have to restart the gateway. As soon as I do, everything takes off and starts working again for another few hours. When these tags quit updating, I notice that I am unable to read/write to any other tags on the system as well, so this must be an opc-ua issue.
I’m running 7.0.5 (b4679), with CompactLogix controller (L35E)