Procedure for Configuring the Settings for a Digital Point’s Current Trend

To define the time period shown on a digital point’s Current Trend:

1. Display the Form for the digital point that you want to configure (see Display a Form in the ClearSCADA Guide to Core Configuration).
2. Select the Digital Point tab.
   (If you are configuring Trend details for another point that uses digital-type processing, select the appropriately named <Point Type> tab.)
3. Use the Trend section of the tab to define the range of the x-axis:

   

   1. In the Offset field, specify the default start time for the x-axis, in relation to the present time, for whenever you view the data as a Current Trend.

      Enter the required offset in the OPC Relative Time Format. You can enter the value directly in the field, or use the Offset window (accessed via the field's browse button) to specify the required value. For example, specify M - 10M for the earliest time on the x-axis to be ten minutes before the beginning of the current minute.

   2. In the Interval field, specify the default time interval for the x-axis, starting from the time specified in the Offset field, for whenever you view the data as a Current Trend.

      Enter the required interval in the OPC Time Format. You can enter the value directly in the field, or use the Interval window (accessed via the field's browse button) to specify the required value. For example, specify 15M for the x-axis to display a 15-minute period.

   3. In the Update Rate field, specify the frequency with which the trace data on a Current Trend is updated.

      Enter the required interval in the OPC Time Format. You can enter the value directly in the field, or use the Interval window (accessed via the field's browse button) to specify the required value. For example, specify 15S for the data to update at 15-second intervals.

4. Save the configuration (see Saving Configuration Changes in the ClearSCADA Guide to Core Configuration).

When a Current Trend is displayed for the point, the Offset and Interval settings define the time period of the Trend, and the start time of the x-axis in relation to the present time. The Update Rate specifies how often the Trend data is refreshed.

Further Information

Overview of a Digital Point’s Trend.

For more information on Trends, see the ClearSCADA Guide to Trends.