Dahua Smart 1U User Manual page 154

5.10.2.4 Configuring Missing Rules
When the target is taken away from the defined area exceeds the set time, the system activates
alarms.
On the rule line that you added, in the Type list, select Missing.
The Missing interface is displayed. See Figure 5-125.
Draw an area.
In the Channel list, select the channel that you want to configure the rules for.
Click
The monitoring screen to configure the missing rules is displayed. See Figure
5-126.
.
Local Configurations 144