User's Manual

SECTION III OPERATION
SM 7063 07/97 3-6
3.4.6 ARMED Status LED (Optional)
Three versions of the CDU front panel are available; (1) panel marked with
ARMED
, (2) panel marked
with
NOT ARMED
, and (3) no marking (Armed Status LED not used). Depending on the version of
front panel equipped on the CDU, this Green LED can be configured via the Diagnostic PC (see
Section IV) to be turned ON or OFF as follows:
1. Front Panel Marked
ARMED
:
In this case, the LED is configured to turn
ON
to indicate that the CDU has successfully completed
the ARMING process. Its purpose is to provided the locomotive operator with a continuous positive
indication that the Emergency Switch is enabled and ready for actuation, if necessary.
2. Front Panel Marked
NOT ARMED
:
In this case, the LED is configured to turn
OFF
when the CDU has successfully completed the
Arming process. Prior to Arming, this LED will be ON to indicate that the CDU has NOT completed
the ARMING process. Its purpose is to provided the locomotive operator with a continuous positive
indication that the Emergency Switch is disabled and will NOT transmit an emergency brake
command. The
ID Code Display
, as always, still shows
“NOT ARMD”
alternating with other
information as a reminder that the CDU has not yet completed the Arming process.
3. Front Panel Not Marked (Armed Status LED not used):
In this case, the panel area normally used for the Armed or Not Armed marking is blank. The LED
is configured to be unused and will always be turned
OFF
. The
ID Code Display
, as always, still
shows
“NOT ARMD”
alternating with other information as a reminder that the CDU has not yet
completed the Arming process.