User's Manual

SECTION III OPERATION
SM 7063 07/97 3-18
3.8.11 Disarming the CDU
When a CDU/End Unit pair are “broken up” (i.e., when the End Unit is moved from one train to
another), it is desirable to "Disarm" the CDU so that it no longer has Emergency Brake control of the
End Unit that is on the other train. This can be done in the following two ways:
Method 1: Arming to “00000”
1. This method requires the operator to enter an ID code of "00000" in the same manner as described
Section 3.8.1. This is a reserved ID code used only for disarming purposes.
2. When the operator presses the
SET
key, the currently displayed ID code in the parameter storage
EEPROM is replaced with "00000".
3. Once the “00000” have been entered and saved, press the
COMM ARM
key. This will cause the
CDU to extinguish the “NOT ARMD” alarm indication and, in effect, Arm to ID code “00000”. Note
that if the CDU is configured for Automatic Arming, it cannot be Armed to “00000”.
Method 2: Using the Disarming Menu Function
1. The preferred method for disarming the CDU is to use the built-in Disarming Menu Function. This is
selected by pressing the
MENU UP
or
MENU DOWN
key until the
Function Menu Display
reads:
" Disarm: press SET "
2. When the
SET
key is pressed, the CDU prompts the operator to confirm the Disarming process as
follows:
" Press SET to Confirm Disarm "
3. When
SET
key is pressed again, the CDU begins disarming itself and
Function Menu Display
briefly reads:
" Disarming ... "
4. Upon completion of the disarming process, the
Function Menu Display
indicates:
" System is NOT ARMED "
The
ALARM
indicator will flash ON accompanied by 5 beeps from the sonalert, and the
ID Code
Display
will alternate between:
“ ID = 00000 “
and
“ NOT ARMD ”
This indicates that the CDU is no longer Armed and its ID code has been set to “00000”. In addition,
the ARMED Status LED, if equipped on the front panel, will turn OFF (for panels marked with
ARMED), or turn ON (for panels marked with NOT ARMED).