User's Manual

SECTION III OPERATION
SM 7063 07/97 3-7
3.5 FUNCTION KEYS
The CDU Function Keys consist of nine (9) pushbuttons. These are illuminated ("back-lit") for
readability at night. All CDU functions are performed using these keys.
The table below provides a quick reference on the purpose each Function Key:
Function Key Description of Operation
1
MENU UP
Selects the next menu item in ascending order
2
MENU DOWN
Selects the next menu item in descending order
3
" "
Moves the "flashing selector" prompt for entry of numeric digits one
position to the
right
. The selected active digit will flash.
4
" "
Moves the "flashing selector" prompt for entry of numeric digits one
position to the
left
. The selected active digit will flash.
5
" "
Increments the selected active digit by 1. If depressed for more than 1
second it continues to increase. Wrap around to 0 occurs after 9. This
key is also used to increase the sonalert volume and front panel display
brightness.
6
" "
Decreases the selected active digit by 1. If depressed for more than 1
second it continues to decrease. Wrap around to 9 occurs after 0. This
key is also used to decrease the sonalert volume and front panel display
brightness.
7
SET
Accepts the value on the display as the operator selected value.
8
CANCEL
Allows the operator to exit out of a menu item and return to the previously
active menu item.
9
COMM ARM
Initiates a communications test and is also used to complete the Arming
process with an End Unit.
Table 3-3. Quick Reference: CDU Function Keys
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
Sonalert Function Keys Emergency Brake Switch
ARMED