Manualshelf

Technical Specifications

ManualsBrandsGE ManualsOilfieldGE Valve Software Tools MN-ValVue-v2-8-IOM
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Button Lock
Configure Screen
Button Lock
The SVI II AP comes with an optional local display and buttons for data entry. These buttons
can be used to perform basic SVI II AP setup without the need for ValVue or a handheld. It
may, however, be desirable after initial setup to lock the buttons so that the parameters
cannot be inadvertently changed from the buttons. Several levels of locks are provided:
Allow Local Buttons (level 3): Buttons on the SVI II AP are enabled.
Lock Out Local Cal. - Config. (level 2): You can use the buttons to perform operations in
normal operating mode and manual mode, however you cannot go to configure or
calibrate mode.
Lock Out Local Manual (level 1): You can examine variables in normal operating mode
but may not put the valve in manual mode (and therefore cannot get to calibrate or
configure modes).
Lock Out All Buttons (level 0): The buttons are disabled.
Bumpless Transfer
This option provides a means to maintain smooth valve control positioning when changing
to Normal mode from Manual or Setup. Without Bumpless Transfer, when changing to
Normal mode, the setpoint could vary in a manner that causes a significant process
disturbance. Bumpless Transfer moves the controller signal to match the valve position so
that smooth resumption of control with little disturbance results.
When Bumpless Transfer is selected, returning to Normal mode from Manual or Setup mode
is deferred until the input signal matches the current valve position. Either the input signal or
the valve position can be changed to match. If nothing is done, the system slowly changes
the position until it matches the signal setpoint. The time taken to move to the position is
determined by the Transfer Time which is a number between 0 and 255 and is
approximately the number of seconds required to move the valve 100% toward the signal
position.
Near Closed
The near closed value determines the value of position below which the valve is considered
near closed by the continuous diagnostic calculations.