225
4
Trend
What you can do on the Trend Tab
Use the Trend tab (see Figure 29) to observe real time valve performance. These process trend
graphs are useful for troubleshooting a control valve and for tuning the PID positioning
parameters. The graphs can be manipulated only on the Y axis.
You can detach the trend as a separate window for viewing while performing calibration and
diagnostic tasks. To detach the trend:
Right click in any tab select Detach Trend.
In Manual or Setup mode, drag the position indicator to change the valve position.
Figure 29 Trend Tab Displaying All Parameters
Commentaires sur ces manuels