Pushbuttons And Local Display; Pushbuttons - GE SVI II AP Quick Start Manual

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 monitor-
ing 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 set-
up 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:

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:
16 | =GE Oil & Gas
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
Left Button - Marked with
parameter option currently displayed.
Middle Button - Marked
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.
*
, permits you to select or accept the value or
–
, permits you to move back through the menu
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