Normal Mode Of Operation; Fire Alarm Mode Of Operation - Honeywell NOTIFIER NFS2-640 Operation Manual

Operation of the Control Panel

3.2 Normal Mode of Operation

The system operates in Normal mode when no alarms or troubles exist. In Normal mode, the con-
trol panel displays a System Normal message as follows
In Normal mode, the control panel does the following functions at regular intervals:
• Polls all SLC devices and the four NACs to check for valid replies, alarms, troubles, circuit
integrity, supervisory signals, etc.
• Checks power supply troubles and batteries at 10-second intervals
• Sends a supervisory query on the optional FDU-80 and verifies proper response
• Refreshes the LCD display and the optional FDU-80 display and updates time
• Scans for any keypad or Control Key entries
• Performs a detector automatic test operation
• Tests system memory
• Monitors for microcontroller failure

3.3 Fire Alarm Mode of Operation

3.3.1 How the Control Panel Indicates a Fire Alarm
When an initiating device (detector or monitor module) activates, the control panel does the follow-
ing:
• Produces a steady audible tone
• Activates the System Alarm relay (TB4)
• Flashes the
• Displays a Type Code that indicates the type of device that activated the fire alarm
• Displays
the device, as shown below:
Status banner
Extended 12 character
custom label
• Sends an Alarm message to the LCD display, remote annunciators, History buffer, installed
printers, and CRT-2s.
• Latches the control panel in alarm. (You can not return the control panel to normal operation
until you correct the alarm condition and reset the control panel)
• Initiates any Control-By-Event actions
• Starts timers (such as Silence Inhibit, Auto Silence)
• Activates the general alarm zone (Z00)
18
S Y S T E M N O R M A L
Figure 3.1 Sample System Normal Message
LED
FIRE ALARM
in the status banner on the LCD display, along with information specific to
ALARM
Type Code of initiating device
A L A R M : P U L L S T A T I O N I N T E N S I V E C A R E U N I T
E A S T E R N W I N G Z 0 0 4
Zone
Figure 3.2 Sample Fire Alarm Display
0 1 : 5 6 P 0 4 1 5 1 5 S a t
0 3 : 1 0 P 0 7 1 4 1 5 2 M 1 4 7
Time and date of trouble
NFS2-640 Operations P/N 52743:L4 06/10/19
Normal Mode of Operation
Custom descriptor for
this device location
Device address