User`s guide

4-8 Display Terminals
The override command changes the value of a point whose values are
set by the controller through an automatic control process. Override
the point to prevent the controller from changing its value. This can be
thought of as a manual override of the automatic control process. A
release command must be sent to the point to return it to automatic
control (see Releasing Overridden Points in the Detailed Procedures
section). Examples are digital outputs and analog outputs used in
control loops.
The DX automatically detects if the point being commanded needs to
be overridden and changes the command procedure accordingly.
IMPORTANT: Controllers connected to a Metasys supervisory
system may also be sent adjust and override
commands from the supervisory system. The
controller accepts the last command from the
supervisory system or DX LCD Display.
Notes: Commanding digital (binary) outputs from the DX LCD
Display that have been overridden from a Metasys
supervisory system has no effect on the output of the
controller until they are released from the Metasys system.
Changes made to points from the LCD terminal are not
reflected as an override (or as releasing an override) from the
Metasys supervisory system.
Alarm Summary
The Alarm Summary provides an overview of all of the points
currently in an alarm state. In this way you do not have to search
through pages of point data to find the alarms in your system.
Note: The Alarm Summary shows alarms only on the points
included in the display configuration defined as alarms,
i.e., points that also appear in the Point Data screens. It does
not show alarms on other points in the DX controller.
Most Recent Alarm and Total Alarms
The bottom line of the display screen is dedicated to displaying the
most recent active alarm and the total number of points currently in an
alarm state. The Alarm field shows the point description of the most
recent active alarm followed by the point’s status. The Total field
shows the number of points currently in an alarm state.