Vertiv Liebert AC8 - Set up Alarmable Inputs in Latched or Unlatched Mode; Set up Delay Time

7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode
Alarmable input points may be set up in Latched mode (Y), which requires
the user to clear the Liebert AC8 alarms after an alarm has occurred, or
Unlatched mode (N), in which alarms will automatically clear after a return-
to-normal state. The default setting for alarmable inputs is L(Latched).
Any input defined as an event is automatically Unlatched.
A digital input defined as Latched does not reset automatically after an
alarm. It will remain in the triggered position even after the monitored
device returns to normal. After an alarm, the user must manually reset
Latched inputs, as described in Clear Active Alarms on page105. This also
means that any digital outputs linked to a Latched digital input will remain
triggered until the input is manually reset.
A digital input defined as Unlatched will automatically track the status of
the monitored device. No action by the user is required.
• From the Setup Inputs Menu, choose Latched, as shown above
right, and press Enter.
• To change this feature, use the arrows to choose Y (Yes -
Latched) or N (No - Unlatched), then press Enter.
NOTE: Only alarmable input points may be set up as Latched. Once an
input is defined as an event, the Latched entry displays N/A. If you
attempt to set up an event as Latched, the message shown at right
appears. Press the ESC key to return to the previous screen to continue
configuring the digital input.
The only way to reset latched alarms is by clearing active alarms. This step is required to return latched
points to their normal state. For details, see Clear Active Alarms on page105.
7.3.5 Set Up Delay Time
Each input may be set up with a specified time delay between the
occurrence of an alarm or event—a monitored device changes state—and
any response by the Liebert AC8. This feature can prevent needless
responses to transient conditions.
This delay is the amount of time that must elapse before the Liebert AC8
acknowledges the change of state in the monitored device and takes any
further action, such as dialing configured pagers. The default time delay is 1
second (displayed as 00 MIN : 01 SEC).
The time delay applies only when a monitored device changes from its
normal state—for example, the Liebert AC8 detects a closed contact that is
defined as Normally Open.
When the monitored device returns to its normal state, the Liebert AC8
acknowledges the change of state immediately.
• From the Setup Inputs Menu, choose Delay, as shown at right, and press Enter.
• To change the time delay in minutes and seconds (in the range of 00:00 to 99:59):
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