Hi,
I have a few tags that are reporting Loggernet environmental data. Sometimes these sites stop reporting due to radios failing or interferance from other equipment.
I need to know how long the tag has not been updating. Ideally show on the processbook display.
The problem is that due to the databse PI is looking at the tags don't zero when they stop updating. The last value just stays in the system and the tag flatlines. (see attachment)
Is it possible to have a count of time since the tag has updated / changed values?
I was looking at the forum post on rate of change notification but not sure if that is the right path to take?
http://community.osisoft.com/index.php?/topic/1927-building-rate-of-change-notification/
Building on the problem, when the site is reconnected and data starts flowing the tag will update all missing information. Thus I really need this to provide a total at the end of each day for how long it was not updating. Not sure if this means I need to look at building a totalizer tag?
Cheers in andvance for the help,
Elliot