User`s guide

Operating the DX LCD Display 4-9
Alarm Log
The Alarm Log shows the history of the last 96 alarms that have
occurred in your system and the date and time of their occurrence. In
addition to the alarm Change-of-State (COS), the log also shows the
return-to-normal COS. This allows you to tell at a glance when alarms
occurred and when they returned to their normal state.
Note: The Alarm Log can only show alarms on the points included
in the display configuration that are 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. The
Alarm Log is cleared when the Display is downloaded.
If the log is full when a new alarm occurs, the oldest alarm is removed
from the log. The data of the Alarm Log is stored in non-volatile
memory of the DX LCD Display so that it is retained through periods
when the display does not have power. This has the consequence that
when the display is moved from one DX controller to a different
controller, the log may show alarms from both controllers (or from
several controllers).
The display automatically places special entries in the log when it
detects that it is connected to a different controller, and when it detects
that it is connected to the same controller but has lost and regained
power.
Clock
The DX controller has a clock and calendar function that maintains the
current time (24 hour format) and date, and that automatically switches
to and from daylight saving time on user-defined dates. The DX LCD
Display can view and set these parameters in the connected DX
controller.
IMPORTANT: If the DX controller is connected to a Metasys
supervisory system, then the supervisory system
automatically synchronizes the controller’s clock and
calendar. In this case, set the time, date, and daylight
saving dates using the supervisory system instead of
the DX LCD Display.