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Override PLC Control - If the checkbox is unchecked, the ITV is controlled externally (typically
from a PLC). When the ITV is externally controlled, the user cannot set the ITV pressure or change
the pressure units from the web page. When the Override PLC Control checkbox is changed, press
“submit” button for the change to take effect. When the Override PLC Control checkbox is changed,
press “submit” button for the change to take effect.
Changing ITV control from the master to the web page (checking the Override PLC Control
checkbox) gives the user control of the ITV. There is no pressure change until the user enters a
pressure setpoint in the Pressure Setpoint box.
Changing ITV control from the web page to the master (clearing the Override PLC Control
checkbox) gives the master device control of the ITV. There may be an immediate pressure change
to the pressure setpoint sent from the master device.
Note: Override PLC Control will be disabled when the user exits this page.
Engineering Unit Mode - This is a checkbox to allow the user to change pressure engineering unit
configuration of ITV from the web page. If this checkbox is checked, the user can change the
engineering unit from the web page by selecting a pressure unit for the set of radio buttons of
Pressure Unit. If this checkbox is unchecked, the user cannot change the engineering unit from the
web page.
User Gain. This is a data entry box for entering the user gain. When the value of the user gain is
changed, press “submit” button for the change to take effect.
If the user gain value entered is legitimate, the user gain will be submitted to the ITV for pressure or
vacuum regulation.
If the user gain value is out of range, the entered data and the title of “User Gain” will be displayed
in red and a note in red on the right side of the data entry will be displayed to indicate the data
legitimate range. When the user gain value is out of range, the user cannot submit the pressure
setpoint and will get an error message “Parameter setup error. Please correct the error and submit it
again” on the web page.
User Sensitivity. This is a data entry box for entering the user sensitivity. When the value of the
user sensitivity is changed, press “submit” button for the change to take effect.
If the user sensitivity value entered is legitimate, the user sensitivity will be submitted to the ITV
for pressure or vacuum regulation.
If the user sensitivity value is out of range, the entered data and the title of “User Sensitivity” will
be displayed in red and a note in red on the right side of the data entry will be displayed to indicate
the data legitimate range. When the user sensitivity value is out of range, the user cannot submit
the user sensitivity and will get an error message “Parameter setup error. Please correct the error
and submit it again” on the web page.
21.4. Login Management Tab
When Login Management on the menu is selected, Login Management web page will be displayed.
With this web page, the user can change Username and Password. Username and password should
be 1-15 alpha-numeric characters. When username or password is changed, press “Update” button
for the change to take effect.
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