Concept
Trend Logs
A trend log is a collection of time-stamp values. In WebStation, you can create a trend log from a value.
Interval Trend Logs
The interval trend log collects data at a specific time interval. Each logged value is stored as a record in the trend log. Use this trend log when the logging interval is less than 1 hour.
For more information, see Interval Trend Logs .
Extended Trend Logs
You use an extended trend log to transfer records from a trend log. An extended trend log can be connected to a trend log or connected in a series to another extended trend log. Only one extended trend log can be connected to a trend log.
For more information, see Extended Trend Logs .
Log Record Storage
All trend logs use circular storing. How many records a trend log can store before overwriting old ones depends on the trend log configuration.
For more information, see Log Record Storage .
Meter Function
The meter function adds meter properties to any trend log type to seamlessly handle consumption calculations independent of meter rollover or meter exchange.
For more information, see Meter Function .
How Trend Logs Work
Interval Trend Logs
Meter Function
Extended Trend Logs
Log Record Storage
Manually Adding a Trend Log Record to a Trend Log