Peripherals Manual 485 Alarm Panel • 7
8. Release the Time/Date button.
Operation
Modes of Operation
There are two basic modes of operation for the alarm
unit.
No Unacknowledged Alarms
When there are no unacknowledged alarms, the display
will show the date/time and the message NO ALARMS.
During this mode of operation, users may view the previ-
ous 20 alarm messages in the 485 Panel’s log by using the
UP and DOWN arrow keys (see “Displaying Alarms” for
information about viewing alarms).
Unacknowledged Alarms
When there are unacknowledged alarms, the display
will show the date/time and the message ALARMS. Press-
ing the arrow keys will display the unacknowledged
alarms. From this screen, you may also reset the unac-
knowledged alarms (see “Acknowledging and Resetting
Alarms” below for more).
Acknowledging and Resetting Alarms
When the unit receives an alarm message, the display
will show the word ALARMS, and the alarm LED will il-
luminate. The buzzer will sound if the 485 Alarm Panel is
set up to do so (see “Audible Annunciation,” page 5).
Pressing the Reset button once will silence the audible
alarm. At this time, users may view the new alarms by us-
ing the arrow keys (see “Displaying Alarms” for more spe-
cific instructions).
Once the conditions that caused the alarms have been
corrected, pressing the Reset button a second time will ac-
knowledge and reset all new alarms. The alarm messages
are saved in the 485 Alarm Panel’s memory as “old”
alarms. If an alarm reoccurs after it has been reset, the an-
nunciator will sound again.
Displaying Alarms
A single alarm message consists of four lines (two
screens) of information. The first two lines give informa-
tion about the time, date, and unit number for the alarm,
and the last two lines give a description of the alarm.
Since the 485 Alarm Panel display can only display two
lines at a time, users must use the arrow keys to view all
four lines of an alarm message.
Alarm messages may be thought of as a list on a sheet
of paper. The display is simply a window moving up or
down the page viewing the first two or the second two lines
of each alarm. Press the UP and DOWN arrow keys to
scroll through this list and view the alarms.
Pressing both arrow keys simultaneously will bring the
display back to the screen that says ALARMS or NO
ALARMS. From this screen, users may begin viewing
alarms again starting with Alarm #1.
Network Loss
If the 485 Alarm Panel loses communications, it will
turn on both the LED and audible alarms and display NET-
WORK DOWN on the display. This may be acknowledged
by pressing the Reset button. This error suggests a wiring
or switch setting problem.
If this error occurs, follow the checklist below:
• Check for loose cable connections at both the
RS485 NETWORK terminals on the 485 Alarm
Panel and the REFLECS COM B terminal(s).
• Ensure that the network cable is properly wired
(see “Network Wiring,” page 4).
• Check that the Device ID number chosen for the
485 Alarm Panel is not being used by another
unit on the network. Refer to “Device ID Num-
bering,” page 4.
• Check that the 485 Alarm Panel’s baud rate is set
to 4800 baud. Rockers 6 and 7 on switch SW2
should be in the DOWN (OFF) position. All
REFLECS units on the network must also have
their baud rates set to 4800 (refer to the unit’s
I&O Manual for more).
If the problem still exists after the above checklist has
been followed, contact CPC support.
Clearing Alarms
To clear all alarms from the 485 Alarm Panel’s memo-
ry, remove power from the panel by turning the power
switch OFF or by unplugging the power cord, and power up
the unit while holding down all four buttons on the front
panel. All alarms will be cleared.
If the unit goes into CLOCK SET mode when powered
up, press the RESET button until NO ALARMS appears on
the display.
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