GE MN-ValVue-v2-8-IOM Manuel de service Page 248

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ValVue Digital Communications Software Ver. 2.80
248
GE Oil & Gas
Run Auto Tune: Automatically finds appropriate PID parameters for the valve ( “Auto
Tune” on page 251).
Full Open: Moves the valve to full open. This command works by taking the valve out of
closed loop control and sends a high or low signal to the I/P.
Full Closed: Moves the valve to full closed. This command works by taking the valve out
of closed loop control and sends a high or low signal to the I/P.
Set Valve Position: Allows you to set the valve to a specific position (this is accomplished
by momentarily returning to manual mode, repositioning the valve, and returning to
setup mode).
Reset to Factory Cal: Resets the signal calibration to factory settings.
Detach Trend: Removes the Trend display from the anchored tab format and creates a
separate trend display.
Help: Displays the help file at the Calibrate tab instructions.
Run Find Stops
To determine valve position, the controller must measure and save the closed and open
positions of the valve. This can be done automatically by running the Run Find Stops
procedure from the Calibrate tab context menu.
The SVi1000 first exhausts the actuator and measures the position, then fills the actuator and
measures the position. From these measurements the valve position is determined.
Correction can be made for nominal valve travel if it is less than full travel. A progress tab
appears while the find stops process is running.
To run Find Stops:
1. Right click in the tab and select Run Find Stops.
The Starting Run Find Stops dialog appears.
Figure 49 Starting Run Find Stops
2. Click OK.
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