Configuring the Real-Time Trend Time Span and Update Rate

You can configure the time span and update rate of a real-time trend.

To set a real-time trend time span and update rate

1. If needed, double-click the trend object. The Real Time Trend Configuration dialog box appears.

2. In the Time area, type the length of time in the Time Span box that you want to appear on the horizontal x-axis of the trend.

3. Select the unit of measure for trend time.

   • Seconds (Sec)

   • Minutes (Min)

   • Hours (Hr)

     For example, if you enter 30 in the Time Span box and then select Min, the time span shown on the chart is 30 minutes.

4. In the Sample area, type a number in the Interval box that the trend expression is evaluated and the chart updates.

5. Select the interval unit of measure.

   • Milliseconds (Msec)

   • Seconds (Sec)

   • Minutes (Min)

   • Hours (Hr)

     For example, if you enter 10 in Interval and then select Sec, the real-time trend is updated every 10 seconds.

6. Keep the Real Time Trend Configuration dialog box open and go to the next procedure described in Configuring Real-time Trend Display Options.