Technical Specifications

59
PID Controller
Using ValVueFF
PID Controller
The PID Process Controller dialog box (Figure 55) contains the tools for managing the
PID function block. It is composed of frames that group controls and displays:
❑ The PID Status frame displays and controls the PID States (block modes),
Setpoint and Process Variable, and the Device tagname. In Manual State (M),
drag the PID output slider to move the valve. In Local State (L), drag the Setpoint
Slider (or enter a value in the Setpoint text box) to change the process variable
Set Point. In Cascade (C), and in Remote cascade (R), the Set Point is
controlled by a function block or remote application.
❑ Others frame: Click Change to access the Change PID Parameter dialog to tune
the P, I and D parameters. The Alarm Status fields display the actual pressure,
cascade and remote cascade setpoints and turn red when in alarm.
❑ PID Output and Valve Position: Use the slider to tune the PID output and see the
valve position above.
Figure 55 PID Process Controller Dialog Box