76 CHAPTER 7 CHANNELS-ALERTS-ZONES
Alerts
e alert is the mid-level detection unit and is used to dene the corresponding channel’s
output (see Figure 7.15).
Figure 7.15 – Alert Configuration
Enabling an Alert
When an alert is enabled, the alert section of the setup screen turns white; when an alert is
disabled, the alert section turns dark gray. A normal channel contains alerts 1 through 4 and
a latched channel contains an ON alert and OFF alert that cannot be disabled.
Each enabled alert must have at least one enabled zone. If you attempt to save an invalid
alert conguration, a prompt will appear asking you to activate one zone for each enabled
alert.
Logic (OR/AND)
An alert’s logic setting species the Boolean logic operation to be applied to the alert’s zone
outputs. e available options are OR and AND. If OR logic is selected, the alert will turn
ON if one or more zones have active outputs; if AND logic is selected, the alert will turn
ON only if ALL enabled zones have active outputs.
Inverted Zones
In order to provide more exibility, an alert can invert a given zone’s output BEFORE ap-
plying the alert’s specied logic operator on the zone outputs.
For example, if an alert has only one enabled zone (zone1), and that zone’s output is OFF
(did not nd a qualied detection in the zone), then the alert’s output will be OFF. How-
ever, if the alert were congured to invert the zone’s output, then when the zone’s output is
OFF, the alert’s output will be ON.
Zones
e zone is the lowest-level detection unit. A zone’s output is used to dene the corre-
sponding alert’s output.
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