Technical Specifications

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Controller Settings Tab
Controller Dead Zone When the difference between the setpoint and the process vari-
able is less than the dead zone, the controller takes no action to
change the output.
Apply Settings Sends the values on the tab to the SVI. Changes made on the set-
tings tab are not made until the Apply Settings button is clicked.
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).