View Tag Trends and Raw Data

About this task

This topic describes how to access the trend chart of tag data. Note that the tag trend should not be used for detailed data. And, trend data is not supported for array tags.

Procedure

  1. Access Historian Administrator.
  2. Select Tags.
  3. Right-click the tag whose trend chart you want to access, and then select Trend.
    The trend chart of the tag values appears.
    Note: To change the criteria, select Criteria, and then enter values as described in the following table.
    Field Description
    Start Time Select the start time of the trend chart.
    End Time Select the end time of the trend chart.
    Sampling Select the data type that you want to use.
    Interval Enter the interval at which you want to plot the tag data.
    Criteria Strings Enter the sampling mode, calculation mode, and/or query modifiers. Query modifiers are used to specify various ways of retrieving data from Historian. For example, you can request raw data with good quality only by specifying the criteria string as: RAWBYTIME#ONLYGOOD. The sampling mode specified with criteria strings takes precedence over the mode specified in the Sampling field.
    You can also scroll back and forth on the x-axis time scale by selecting on the single and double left and right arrows at the bottom of the page.