How Does The "Del" Function Work - Pittway NOTIFIER AM2020 Troubleshooting Manual

How Does the "DEL"
Function Work?
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The "DEL" function can be used in the Control-By-Event equation of an output
type device (CMX, XPC, or XPR modules) or of a reverse-activated zone to delay
the activation of that output device or zone and as an option turn the output
device or zone off after a specified time.
Equation Format: DEL(dd.dd.dd tt.tt.tt (Zn))
dd.dd.dd is the time delay in
an hour.minutes.seconds
format.
Example 1: Assume that Zone 205 is a reverse activated zone with the following Control-
By-Event equation:
DEL(00.01.00 (Z12))
This means that after Zone 12 has been activated for one minute, Zone 205 will activate
and stay active until either the panel is reset or Zone 12 returns to normal.
Example 2: Assume that Zone 206 is a reverse activated zone with the following Control-
By-Event equation:
DEL(00.01.00 00.05.00 (Z12))
This equation means that after Zone 12 has been activated for one minute, Zone 206 will
activate and stay active for five minutes unless the panel is reset or Zone 12 returns to
normal.
The operand in a "DEL" equation (Zone 12 in both the above examples) may be
either an input device, a forward activated zone or a reverse activated zone.
Application Note: The "DEL" equation may be used to delay the activation of the main
sounders in a building to allow time for the source of the alarm to be investigated. Note:
This application should only be used after obtaining written permission from the Local
Authority Having Jurisdiction. Consider the following for a hypothetical building:
All the smoke detectors in the building are mapped to Zone 1 (an FZON).
All the pull stations in the building are mapped to Zone 200 (an RZON).
The control modules that control the main sounders in the building are also mapped to
Zone 200.
Zone 200 is given the following CBE:
DEL(00.01.00 (Z1))
Note: All the smoke detectors that are mapped to Zone 1 should be programmed as non-
tracking to avoid resetting the one minute delay timer.
When a smoke detector goes into alarm it activates Zone 1. A counter is started
that will delay the activation of Zone 200 for one minute, thus delaying the main
sounders in the building and allowing the security guard time to investigate the
source of the alarm.
A control module (mapped to Zone 1) may be configured to sound a local
sounder at the security guard's location to alert the guard to the possible fire in
the building. In addition, the panel's piezo sounder will automatically activate.
Once Zone 1 is activated, three possible scenarios may occur:
1) The guard goes to investigate the alarm and discovers that it was a false
activation. In which case he can reset the panel before the building is
needlessly evacuated.
2) The guard goes to investigate the alarm and realizes that it is indeed a fire.
So he pulls the closest manual pull station which causes an immediate
AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
firealarmresources.com
Zn is the input device or zone that
acts as a trigger for the delay timer to
start.
tt.tt.tt is the time that the output device or zone will stay
on after activation (this is optional, leaving it out will
result in the output device or zone staying on until the
operand restores or until the panel is reset).
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