User's Manual

SECTION III OPERATION
SM 7063 07/97 3-5
3.4.5 LED Annunciators
A separate bank of seven (7) rectangular LED annunciators are provided to alert and draw the
attention of the locomotive operator to important conditions. These are color coded Red or Green to
indicate alarm or status conditions, respectively.
In the case where additional information about a particular annunciator is required, a corresponding
message is displayed on the ID Code Display.
The table below provides a quick reference on the purpose of each Annunciator LED:
Annunciator Functional Description Color
1
MARKER
ON
Turns ON to indicate that the Marker Light on the End Unit is
flashing.
Green
2
LOW
BATTERY
Turns ON to indicate the existence of a low battery condition in the
End Unit. The ID Code Display indicates if the alarm is a weak or
replace battery condition.
Red
3
MOVING
Turns ON to indicate that motion has been sensed at the last train
car. The ID Code Display indicates the initial direction as
“Forward” or “Reverse”.
Green
4
STOPPED
Turns ON to indicate that the motion of the last car has stopped.
Note: this LED is initially OFF until the last car begins to move and
then comes to rest again.
Green
5
R TO F
FAILURE
Turns ON to indicate the existence of a rear-to-front radio
communications failure. When rear-to-front communications are
restored, this LED will turn OFF.
Red
6
F TO R
FAILURE
Turns ON to indicate the existence of a front-to-rear radio
communications failure. When front-to-rear communications are
restored, this LED will turn OFF.
Red
7
ALARM
Turns ON to indicate the existence of a system problem. The ID
Code Display gives details on the nature of the Alarm. It is
extinguished when the condition is corrected.
Red
Table 3-2. Quick Reference: CDU Annunciator LEDs
I
D = 12345
Union Switch & Signal Inc.
SET
MENU
UP
MENU
DOWN
ALARM
MARKER
ON
LOW
BATTERY
F TO R
FAILURE
R TO F
FAILURE
MOVING
PRESSURE
E
M
E
R
G
E
N
C
Y
CANCEL
COMM
ARM
STOPPED
ID Code Display
Annunciator LEDs
ARMED