Configure which tags to display on a real-time trend

A real-time trend pen creates a graphical representation of current data from any local tag or an expression that contains one or more local tags. You configure the pens that show tag data in a real-time trend.

Configure real-time trend tags

1. Double-click the trend object in the window. The Real Time Trend Configuration dialog box appears.

   

2. In the Expression area, type the name of a local tag or expression that contains one or more local tags.

   If you double-click in the Pen box, the Select Tag dialog box appears showing a list of tags defined for the application. You can assign a tag to the pen by selecting it from the Select Tag dialog box.

3. Select the color box next to each pen assigned a tag to show a color palette.

4. Select the color that you want to assign to the pen.

5. In the Width box, type the line width in pixels for each pen shown in the trend.

   Selecting a line width greater than 1 increases the time required to update or print a trend.

6. Select the Only update when in memory checkbox if you want the trend to update only when shown in the active window.

   If you do not select this option, the trend updates continuously even if the window is closed. Continuous trend updating slows system performance.

7. Keep the Real Time Trend Configuration dialog box open and go to the next procedure described in Configure the real-time trend time span and update rate.