概念
趋势日志
A trend log is a collection of time-stamp values. In WebStation, you can create a trend log from a value.
间隔趋势日志
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.
有关更多信息，请参阅 间隔趋势日志 .
扩展趋势日志
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.
有关更多信息，请参阅 扩展趋势日志 .
日志记录存储
All trend logs use circular storing. How many records a trend log can store before overwriting old ones depends on the trend log configuration.
有关更多信息，请参阅 日志记录存储 .
仪表功能
The meter function adds meter properties to any trend log type to seamlessly handle consumption calculations independent of meter rollover or meter exchange.
有关更多信息，请参阅 仪表功能 .
趋势日志运作方式
间隔趋势日志
仪表功能
扩展趋势日志
日志记录存储
手动添加趋势日志记录到趋势日志中