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The alarm is automatically cleared when the exception or motion that triggers the alarm no longer
exists.
The alarm persists if the exception or motion persists.
6.5 Querying History Alarms
To query a specific type of history alarms generated on all cameras connected to the NVR:
1. Choose
Main Menu
>
Alarm
>
History Alarm
.
2. Select a general alarm type, for example, service alarm, as shown in the following figure.
3. Select a service alarm type, for example, motion detection.
4. Specify
Source
and
Time
.
5. Click
Search
.
6. (Optional) Click
Play Back
to play back the recording that is started immediately after the alarm is
triggered. Note that the recording is stopped as soon as the exception or motion that triggers the alarm
no longer exists.