Create trending

The following image shows the default form to edit a trending.

* indicates a required field.

Following configuration items dealing with the recording of the data:

Field	Description

Field	Description
Enabled	Enable (default) or disable the trending. When a trending is disabled: It does not log any values. Its name is displayed in italic font. In the Trending app / plot view, the trending name is extended by " - disabled" In the Metering app / calculation chart, the trending name is extended by " - disabled"
Name	Name of the trending.
Description	Trending description.
Item	Select an item from the item tree. The trending logs the values of this item.
Type	Type of the trending: All: All value changes of the item are logged. Average: The average value of the item over a given period of time is recorded. COV: The value of the item is logged when it exceeds a given absolute or relative threshold. Delta: The difference of the current value to the previous value is recorded in intervals of the given time period. Max: The maximum value of the item over a given period of time is recorded. Min: The minimum value of the item over a given period of time is recorded. Pulse: The number of received item values. Sampling: For each interval of the given time period the current value of the item is logged. Notes: For items of data type String, only the trending types All and Sampling are available. (since 4.2.2010) Depending on the selected trending type, additional form fields may be shown.
Schedule at full hour	Enabled: The recording schedule starts at the full hour and repeats at the given interval. Disabled: The recording schedule starts when the trending is saved or the server has been restarted and repeats at the given interval.
Max age [days]	Trending data older than the given age in days will be deleted. 0 (default): Ignore age of data.
Interval [s] Interval [min]	Time interval in seconds. Time interval in minutes.
COV type	In a COV trending, Absolute (default): Specifies the threshold as absolute value. Percentage: Specifies the threshold as relative value.
Threshold	In a COV trending, when the threshold is exceeded then the current item value is logged.
Scaling	Disabled (default): No scaling of the item value. Enabled: The item value is linearly scaled according to the given coefficients before being logged. Additional form fields appear.
Min-Max Validation	Disabled (default): No validation. Enabled: Values outside the given min-max range are ignored and not logged. Additional form fields appear.
Min allowed value	Minimum value.
Max allowed value	Maximum value.
Time program	Disabled (default): Time program is disabled. Enabled: Data is only logged during the specified period of time.
Start date/time	Start of time program.
End date/time	End of time program.

These fields control how the data gets displayed. The configuration of these fields are the default ones when the data gets shown as plot or table. In the plot or table you can change these settings, but each time you open it again, the default values will be taken as preconfiguration of the plot or table.

Field	Description

Field	Description
Chart	Graphical presentation type of the trending data.
Range	Default time range in plot view: Day, Week, Month, Year, Custom.
Color	Color of the graph.
Decimals	Specifies the precision of values (trending and trendline) shown in table view or plot view. Select the number of decimals to show: 0, 1 (default) to 6, All
Y axis scaling	Dynamic (default): Based on the displayed values, the range of the Y axis is dynamically adjusted. 0-based: The X axis intersects the Y axis at 0.
Y axis label	Label of the Y axis.
Aggregation	Enabled (default): Values are average-aggregated in order to display a well-readable number of values, e.g. 1 value per hour in a day period. Disabled: The recorded raw values are shown in the plot.