16
GE Oil & Gas
ValVue SVI II AP Quick Start
Pushbuttons and Local Display
This section covers the optional local interface consisting of the LCD
alphanumeric display and pushbuttons. Operation of the SVI II AP Digital Valve
Positioner as a local device is controlled through the optional device-mounted
pushbuttons and digital display, shown in Figure
7 on page
17. Using the display
you can read the input signal, valve position, and actuator pressure. The display
sequences from one variable to the next every 1.5 seconds.
Using the pushbuttons you can exit from operating mode at any time and step
through a menu structure to perform a wide range of manual operation,
calibration, configuration, and monitoring functions that are described later in this
section. ValVue is used to perform all diagnostics functions. The pushbuttons do
not support diagnostics functions.
The SVI II AP has two operational modes: Normal Operating Mode and Manual
Mode and two setup modes, Configuration and Calibration. The SVI II AP also
has two modes for handling of faults and power-up: Reset and Failsafe. When
commissioning or checking a control valve with SVI II AP fully installed the
following steps are recommended:
Change mode to Manual mode
Examine and adjust all CONFIGuration items
Enter Calibration mode
Run STOPS to automatically calibrate stroke
Run autoTUNE to set dynamic response
Examine the device STATUS
Introduce manual set point changes to verify dynamic performance
Pushbuttons
The local pushbuttons are located behind a hinged cover, directly below the
display window. To open the cover loosen the screw and swing the cover down.
Always re-fasten the cover after use to protect the pushbuttons from
environmental contamination.
The three pushbuttons perform the following functions:
Left Button
- Marked with
*
,
permits you to
select
or
accept
the value or
parameter option currently displayed.
Middle Button
- Marked
–
,
permits you to move back through the menu
structure to the previous item in the menu or decrement the value
currently shown in the digital display. When used to decrease a
displayed value, holding the button down causes the value to decrease
at a faster rate.
Summary of Contents for SVI II AP-2
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