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Zone Latching
9.2 Creating a Zone Latching Sequence
To create a zone latching sequence
1. Create an initiating device. This can be a monitor zone, input circuit, or a status such as
All Call.
2. Create a non-latching zone such as a monitor zone. This will become a latching zone.
3. Select this zone, and click the Advanced Logic tab.
4. Create an equation that will activate the zone by the initiating zone, input, or status OR
by the zone itself.
For example, this equation is in the monitor zone 01-00-**-IZ-011:
**-**-**-SW-017 OR 01-00-**-IZ-01
**-**-**-SW-017 – All Call common switch
01-00-**-IZ-011 – monitor zone
The zone 01-00-**-IZ-011 will become active when the All Call switch becomes active. If
the All Call becomes inactive, the zone will remain active until the system is reset.
9.3 Creating a Latching Zone with a Timer
You can set the zone to unlatch when a timer expires. For example, this equation is for the
zone 01-00-**-IZ-011:
01-00-00-IN-007:A OR (01-00-**-IZ-011 AND NOT **-**-**-TM-021 EQU TIMER_EXPIRED)
01-00-00-IN-007 – Initiating device
01-00-**-IZ-011 – Zone
**-**-**-TM-021 - Timer 21
The sequence of events is as follows:
1. The initiating device 01-00-00-IN-007 goes into alarm.
2. The equation is now true, and the zone 01-00-**-IZ-011 becomes active.
3. Another initiating device starts Timer 21.
4. The initiating device 01-00-00-IN-007 goes back to normal status, but the equation is still
true because Timer 21 is not expired, so the zone remains active.
5. When Timer 21 expires, the equation is no longer true, and the zone becomes inactive.
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