Concept
Journaux de tendance
A trend log is a collection of time-stamp values. In WebStation, you can create a trend log from a value.
Journaux de tendance d'intervalle
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.
Pour plus d'informations, voir Interval Trend Logs .
Journaux de tendance étendus
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.
Pour plus d'informations, voir Extended Trend Logs .
Stockage des enregistrements de journal
All trend logs use circular storing. How many records a trend log can store before overwriting old ones depends on the trend log configuration.
Pour plus d'informations, voir Log Record Storage .
Fonction de compteur
The meter function adds meter properties to any trend log type to seamlessly handle consumption calculations independent of meter rollover or meter exchange.
Pour plus d'informations, voir Meter Function .
Mode de fonctionnement des journaux de tendance
Interval Trend Logs
Meter Function
Extended Trend Logs
Log Record Storage
Manually Adding a Trend Log Record to a Trend Log