Control Keys
2. Use of the Controls
NFS-640 Operations Manual P/N 51334:B 10/03/2003
17
Control Keys
The control panel provides five Control Keys as shown below:
Figure 3 Control Keys
Acknowledge/Scroll Display
Use the
ACKNOWLEDGE
/
SCROLL
DISPLAY
key to respond to new alarm or trouble signals. When pressed, the
control panel does the following:
•
Silences the panel sounder
•
Changes all active LED indicators from flashing to steady
•
Sends an Acknowledge message to the History buffer and installed printers, CRT-2 terminals,
and terminal mode LCD-80s
•
Sends a signal to silence the sounders on the LCD-80 and ACS annunciators
You can also press this key to display multiple alarms or troubles. If more than one alarm or trouble
exists, the control panel displays the next alarm or trouble for 3 seconds (or until you press the
ACKNOWLEDGE
/
SCROLL
DISPLAY
key), then displays the next alarm or trouble.
Note:
If Local Control is set to “NO”, the FACP will not respond to ACKNOWLEDGE, and the piezo will not sound.
Signal Silence
Use the
SIGNAL
SILENCE
key to silence the panel sounder and turn off all audio and visual devices
connected to Notification Appliance Circuits. When pressed, the control panel does the following:
•
Turns off the panel sounder
•
Turns off all silenceable output circuits
•
Lights the
SIGNALS
SILENCED
LED
•
Sends a
SIGNALS
SILENCED
message to the History buffer and installed printers, CRT-2 terminals,
and terminal mode LCD-80s
Note:
If Local Control is set to “NO”, the FACP will not respond to
SIGNAL
SILENCE
.
Drill
Use the
DRILL
key to manually activate all silenceable outputs and Notification Appliance Circuits. To
prevent accidental activation, you must press the
DRILL
key for 2 seconds. When pressed, the control
panel does the following:
•
Turns on all silenceable NACs
•
Turns off the
SIGNALS
SILENCED
LED
•
Sends a Manual Evacuate message to the History buffer and installed printers, CRT-2
terminals, and terminal mode LCD-80s
Note:
If Local Control is set to “NO”, the FACP will not respond to
DRILL
.
ACKNOWLEDGE
SCROLL DISPLAY
SIGNAL
SILENCE
DRILL
HOLD 2 SECONDS
SYSTEM
RESET
LAMP
TEST
NFS640-keypad2.cdr
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