I am having a strange problem where OPC tags are not being updated. I can check the “last change” property of the tag and the value will often say anywhere between 5 minutes ago to a day and a half ago. All of the tags are driven by the default scan rate, one second.
Oddly enough if I delete one of the tags in question and then recreate it it functions properly - I can watch the “last change” property change like the tick of a clock. If this were a few tags it would be no big deal, however with about 1,500 OPC tags I can’t afford the time to manually replace every one.