could you, please, advise,
how we can understand that PI tag's data no more actual?
I mean, I know two cases: when trend line in PI Processbook has been stopped, interupted and
when trend comes to absolutely horizontal line.
In both cases we have data gaps.
When trend line stopped, it is easy to understand that there is data interruption..
When trend comes to horizontal line, receiving the same value for a long time,
it is quite hard to understand that something went wrong with PI tag's data.
Do we have some other methods to monitor PI tag is in a normal state and there are no data gaps?