Technical Specifications

569
Trend Tab
Position Indicator This indicator shows the valve position graphically. The indicator
consists of three parts:
 The upper part contains an indicator that shows the value
of the signal. In Operating mode this is the position setpoint.
In Manual mode. this is the position that the valve moves to
if operating mode is selected.
 The center green bar shows the valve position with full left
as closed and full right as open. The numerical valve
position is shown in the center.
 The lower part contains an indicator (thumb)that shows the
valve setpoint. In Operating mode this is the same as the
signal. In Manual mode it is the valve setpoint. You can drag
the thumb to change the valve setpoint. While dragging.
the number in the center bar shows the manual setpoint
that will be selected when you release the thumb.
You can also change the manual setpoint by right-clicking in the
indicator. A dialog box appears where to type the exact setpoint for
use.
Change Mode The SVI can be in any of several operating modes:
 Operating: In this mode the SVI responds to the input signal
and positions the valve appropriately (indicator green).
 Manual: In this mode the valve does not respond to the
input signal. Instead it remains stable in one position which
is the position that the valve was when manual mode was
entered or a new position selected by the user (see Setpoint)
(indicator yellow).
 Configure: In this mode you can set configuration
parameters of the positioner or controller (indicator yellow).
 Calibrate: In this mode you can set calibration parameters
of the positioner (indicator yellow).
 Diagnostic: In this mode you can run response time tests,
step response tests, and positioner signatures (indicator
yellow).
 Bumpless transfer: This is a transition mode when you select
operating mode from manual mode (see Bumpless
Transfer) (indicator red).
 Failsafe: When the SVI cannot operate correctly the device
goes to the failsafe position and remains in the failsafe
mode until the user intervenes (indicator red).