64 NFS2-640 Operations P/N 52743:L4 06/10/19
Special Zone Operation Presignal and Positive Alarm Sequence (PAS) Operation
A.5.3 How to View Presignal and PAS Selections
You can use the Read Status Entry option to view the current selection for the Presignal function.
To do so, press the keys in sequence:
The LCD display shows the current selections for the Presignal function. The figure below shows a
sample LCD display of a Presignal function selected for PAS and a Presignal Delay Timer of 60
seconds:
Figure A.8 Sample Read Status for Presignal Function
A.5.4 How to Respond to an Alarm with Presignal Delay Timer (no PAS)
If an alarm occurs with a Presignal Delay Timer (60-180 seconds), the control panel displays the
type of device and the SLC address of the device causing the alarm. If a second alarm occurs during
the Presignal Delay Timer, the control panel aborts the Presignal Delay Timer and activates all pro-
grammed outputs. A sample Alarm screen for a monitor module is shown below:
Figure A.9 Sample Alarm Display Screen
The
FIRE ALARM LED flashes and the panel sounder pulses a steady tone. The control panel latches
until the alarm is corrected and you press the S
YSTEM RESET key to reset the control panel. You
have the duration of the Presignal Delay Timer (60-180 seconds) to respond to the alarm before the
control panel automatically activates all outputs programmed to F0. You can take the following
actions:
• To silence the panel sounder and change the
FIRE ALARM LED from flashing to steady, press
the
ACKNOWLEDGE/SCROLL DISPLAY key.
• To abort the Presignal Delay Timer, press the
SYSTEM RESET key.
• To manually activate all outputs programmed to F0, press the
DRILL key (Alarm Signal for
Canadian applications). The Manual Evacuate screen appears, the panel sounder pulses and the
FIRE ALARM LED changes from flashing to steady. The Manual Evacuate screen and Alarm
screen display alternately at 3-second intervals.
If the Presignal Delay Timer reaches its programmed value, without operator intervention, the con-
trol panel activates all outputs programmed to F0.
NOTE: For instructions on programming the Presignal function, refer to the NFS2-640
Programming Manual.
Status Off
Presignal Function status banner
Presignal Delay=60
Seconds
PAS selected
Zone F00
OFF PRESIGNAL FUNCT PRESIGNAL DELAY
DELAY-060 PAS=YES FOO
NOTE: If any monitor modules are programmed with a PAS INHIBIT Type Code and a fire alarm
occurs, zone F0 goes false and aborts the Presignal Delay Timer.
Status banner ALARM
Type Code
MONITOR
SLC address of the
activated initiating device
First zone in the CBE list
(blank if no zone listed)
ALARM: MONITOR MODULE ADDR 1M147
Z004 10:14A 041515 1M147
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