Configure Trend Chart Settings
Before you begin
Procedure
-
In the toolbar of the chart, select
.
The Trend Configuration window appears.
-
Modify the trend chart settings as specified in the following table.
Setting Description Mode Select the mode of the trend chart. The following options are available: - Live: Plots real-time data from a Historian server.
- Historical: Plots historical data from a Historian server.
Duration Select the duration for which you want to plot the data. If you want to select a duration that is not included in the default options, select Custom. Note: For historical data, instead of duration, you can specify a start date in the Start box.Start Select the start date for the historical data. This option is available only for the historical mode. Note: Instead of the start date, you can specify a duration in the Duration box.Sampling Mode Select the sampling mode that you want to use to plot the data. This option is available only for the historical mode. For information on the various sampling modes, refer to the Historian documentation. Sampling Increment Select whether you want to increment the sampling data based on time or count, and then specify the time or count, respectively. Note: The sampling increment may not always be honored. The maximum number of data points plotted on the trend chart is 500. You can zoom in to view more accurate data.Notes Switch the toggle to enable viewing or adding a note on the trend chart.
On the trend chart:- To add a note for the first time for a specific data point, select the data point, and then select
. - To access a note, select
. Note: You cannot modify or delete a note; if you want to augment a note, you can add additional notes. - To add an additional note for a data point, select
. - To navigate through multiple notes, use
and 
.
When you access an existing note, the timestamp and property values that appear during the initial loading of the note correspond to the x-axis and y-axis values for the data point, respectively. If you select each individual note, the actual raw and timestamp values to which the comment was added in the Historian archive appear.
If you add a note to an interpolated value, it is added to the nearest raw value. Due to this, the value displayed in the note may not always match the value plotted on the chart.
Items Select the properties or tags that you want to add to the trend chart. The following options are available: - Assets: Displays the asset model that has been configured in the system. You can browse through the asset hierarchy, and add properties to the trend chart from any hierarchy level. You can add or remove data variables of the asset from the trend chart.
- Historian: Displays the Historian servers configured in the system. You can browse through the servers for tags that you want to add to the trend chart.
Tip: You can search for a tag or a property by selecting
. You can also perform a wild card search by entering *.