I have tried following formula for a channel definition in a Sensor Factory:
- 1:Uptime % 100-Channel(2004,-4)
(2004 is an ID of a PING sensor in my test case; -4 is downtime channel of a PING sensor)
Above formula seems to work only for a channel data which gets shown only on current (default 2 hours) graphs. All the other graphs for that Sensor Factory do not calculate properly - in other words: there is no data (empty results) calculated for older data, at all. Am I doing something wrong or should this work?