A trend file includes an evaluation of meter data over a selected time frame.
A query interval can be defined per device on the web server. This interval determines the time intervals at which the device is read.
The shortest query interval determines the interval between trend files if individual, connected devices have different query intervals. As a result, devices with longer query intervals are not read out at each query.
For example, a device with a query interval of seven days means that a value is only entered in the trend file every seven days.
Additional information on query interval is available in the M-bus web server user's guide (Document A6V11157985), see "Reference documentation".