Question:
Why are some Internal Tags displayed with quality 0 and in red in WatchWindow?
Solution:
This occurs when the Internal Tags are linked to I/O Tags and the Driver is offline, which causes the I/O Tags’ value to be null and have quality 0. Since the Internal Tags are linked to the I/O Tags, they inherit this value and quality, which is indicated by the WatchWindow.
When communication restarts, the WatchWindow will display the Internal Tags in the usual color.
