8.4 Read Errors

Under the buttons, a single line shows either No read errors in green or N read error(s) in red. Tap it to expand the list, which shows each tag that failed and the reason.

· The list covers every tag available for monitoring, not only those selected — so a mistake shows up before you try to trend it.

· It applies to every controller type.

· Tags that read successfully keep updating and trending while others fail.

· A tag drops off the list by itself as soon as it reads successfully again.

· A tag with more than one problem counts once for each problem.

The common messages and what to do about them are listed in Read Error Messages.