SVI-II Instruc Man.book - Fagerberg

Using the Digital Interfaces
Pushbuttons and Local Display
ValVue 2.4
ValVue 2.4 combines the power of the PC with the features of the SVI II AP for
ease of use and automation of positioner operation and full access to all data.
ValVue 2.4 Lite is provided with all SVI II AP positioners and is recommended
for set up, service and maintenance where a PC or laptop is permitted. See
“Configuring and Calibrating with ValVue 2.4” on page 64 for further
information.
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 Positioner
as a local device is controlled through the optional device-mounted
pushbuttons and digital display, shown in Figure 22 on page 40. 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 2.4 is used to perform all diagnostics functions. The
pushbuttons do not support diagnostics functions.
The SVI II AP has two operational modes: Normal (normal operating mode)
and Manual (manual operating 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:
1. Change mode to Manual mode.
2. Examine and adjust all Configuration items.
3. Enter Calibration mode.
4. Run Stops to automatically calibrate stroke.
5. Run Auto Tune to set dynamic response.
6. Examine the device Status.
7. 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.
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