GE SVI II AP Quick Start Manual

Contents

© 2015 General Electric Company. All rights reserved.16 | =GE Oil & GasPushbuttons and Local DisplayThis section covers the optional local interface consisting of the LCD alphanumeric display andpushbuttons. Operation of the SVI II AP Digital Valve Positioner as a local device is controlledthrough the optional device-mounted pushbuttons and digital display, shown in Figure 7 onpage 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 menustructure 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 diagnosticsfunctions. 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 faultsand power-up: Reset and Failsafe. When commissioning or checking a control valve with SVI IIAP 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 performancePushbuttonsThe local pushbuttons are located behind a hinged cover, directly below the display window. Toopen the cover loosen the screw and swing the cover down. Always re-fasten the cover after useto 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 orparameter option currently displayed. Middle Button - Marked –, permits you to move back through the menustructure to the previous item in the menu or decrement the value currentlyshown in the digital display. When used to decrease a displayed value,holding the button down causes the value to decrease at a faster rate.