Configure the pen details

Under the Pen Details section, you can configure the range and units of each individual pens.

1. Select Auto Range for the scaling method to place process values on a trend line.

   If you select Auto Range, the Min and Max fields are disabled. The Y-axis of the trend line is automatically adjusted to show the full range of trend values within the upper and lower boundaries of the trend.

   1. Specify the Margin percentage value. In runtime a margin for the trend area will be dynamically displayed based on the trend values and the margin% specified. This is only for display purposes and does not affect the values of the axis.

      For example: If the minimum value is 10 and the maximum value is 20. The range is 10 (20-10).
      If you specify a margin of 20%, then the margin will be calculated as Range*Margin%; 10*20%=2.
      The maximum value of the Y-axis will be Maximum Value + Margin; 20+2=22. The minimum value of the Y-axis will be Minimum Value - Margin; 10-2=8.

2. If Auto Range is not selected, specify the Min and Max values for the Y-axis of the selected pen.

   You can specify the values directly, or click ... . The Galaxy Browser is displayed.

   If the Min value is greater than the Max value then in runtime the trend pen will be rendered differently and the scale will be opposite to when the Max value is greater than Min value.

   

3. Browse and select an attribute or tag.

4. Enter the Units. Use the Toggle button to enter a static text or select a reference value from the Galaxy Browser. For example: Degrees.

5. Click OK.