Configure which tags to display on the Trend graph

You can use the 16-Pen Trend Wizard to assign tags to trend pens. The 16-Pen Trend Wizard includes a set of columns that specify tag properties shown on the trend. These columns use the default property values assigned to the tag from the Tagname Dictionary. You can override these assigned tag values by specifying other values when you configure the trend.

Configure 16-Pen Trend tags

1. Open the window containing the 16-Pen Trend template.

2. Double-click the 16-Pen Trend. The PenTrend Control dialog box appears with a grid area near the bottom to specify the tags associated with trend pens.

   

3. In the Object Name box, assign a name to the 16-Pen Trend.

   The default name is PenTrend_1, which increments the number in the name as you create each new trend.

4. In the Tagname box, enter the name of the tag to associate with the pen number listed at the left of the grid.

   Double-clicking within a cell beneath Tagname shows the Select Tag dialog box. You can assign a tag to a pen by selecting the tag from the Select Tag dialog box.

   Note: You remove a tag by selecting a Tagname box containing a tag name and pressing your keyboard space bar.

5. In the Color column, click each color box to open a color palette. Select a color for the pen.

   

6. In the EU Text column, enter the text that you want to initially use in run time as the header text for the pen axis for each respective pen.

   This text is the axis text when a pen is set to active. The EU Text column is initially assigned the tag’s engineering units from the Tagname Dictionary. You can override the these default engineering units for the 16-Pen Trend.

7. In the Min EU column, enter the minimum engineering units value assigned to the pen.

   The Min EU column initially shows the tag’s minimum engineering units value from the Tagname Dictionary. You can assign another minimum engineering units value that applies only to a 16-Pen Trend.

8. In the Max EU column, enter the maximum engineering units assigned to the pen.

   The Max EU column initially shows the tag’s maximum engineering units value from the Tagname Dictionary. You can assign another maximum engineering units value that applies only to a 16-Pen Trend.

   Note: The Min/Max engineering units are very important for showing historical trend data. The historical trend shows from 0-100 percent of engineering units scale.

9. In the Min Scale column, enter the percentage that you want to use initially in run time to calculate the minimum pen axis grid for the respective EU scale.

10. In the Max Scale column, enter the percentage that you want to use initially in run time to calculate the maximum pen axis grid for the respective EU scale.

11. In the Dec.Pos column, enter the number of decimal points that you want to use initially in run time when labeling the pen axis grid.

12. In the Width column, select the pen line width in pixels to plot data values shown on the trend.

13. Continue with the next procedure to update the trend time and update rate of a 16-Pen Trend.