P
AGE
28
46131-0598 <90-00018>
OPERATION
T
his section contains descriptions on the front panel push
buttons, control point operation, alarm reporting, and the
202 modem.
F
RONT
P
ANEL
P
USH
B
UTTONS
Five push buttons on the front panel select the type of alarm
information that appears on the LED display.
A
LARM
M
ODE
Alarm mode is the default mode. Normally the display is in this
mode, but if it is not, press button 1 to enter the alarm mode.
There are four possible readouts in the alarm mode:
Readout 1 - No alarms and no failed displays.
The LED display shows a rotating dash that moves from left to
right. If button 1 is pressed, “Cnt” appears on the display.
Readout 2 - Alarms and no failed displays.
The LED display shows the letters “AL” and the number of
alarms present.
Readout 3 - No alarms and failed displays.
The LED display shows the letters “Fd” and the number of failed
displays.
Readout 4 - Alarms and failed displays.
The LED display toggles between the failed display statement
and the alarm display statement.
A
LARM
L
OCATION
Press button 3. The APU scans all alarm points, stopping when
an active alarm is reached. Read the display as follows:
1.
Pxyzz
where
P = TBOS port
x = TBOS port number (1-8)
y = Display number within port
zz = Point number within display
-or-
2.
D zz
where
D = Discrete
zz = Discrete number
If there are no more alarms, “LOC” appears on the display.
A
B
C
D
E
LED Display
1
2
3
4
5
Push Buttons
