Union Products Communication display Unit 6696 ユーザーズマニュアル

SM 7063  07/97                                                                                                                              3-3

The right most decimal point in the Brake Pressure Display will blink ON briefly each time a valid
message with the correct ID is received by the CDU.  This indicator is provided as an aid to the
operator in determining if messages are being received from the End Unit.

The primary purpose of this 8-character alpha-numeric display is to indicate the currently entered EOT
ID code.

This display also provides the operator with additional information regarding ALARM conditions and
system operation.  When information other than the ID code is displayed, it is shown by
alternating the display between the current ID code and the specific alarm or system function.
These messages include:

Alarm Messages:



“LOW PRES” - The brake pipe pressure at the rear of the train has dropped below the low pressure 

threshold (typically 45 psig).



“VALVFAIL”

- The emergency brake valve drive circuitry in the End Unit may not be functional.



“NO AIR”

- The End Unit has just powered down due to 0 psig for greater than 5 minutes.



“NOT ARMD” - The CDU has not been “Armed” to its respective End Unit.

System Information Messages:



“FORWARD”  - Displayed in conjunction with the MOVING annunciator to indicate that the initial

direction of last train car is in the forward direction.



“REVERSE”   - Displayed in conjunction with the MOVING annunciator to indicate that the initial

direction of last train car is in the reverse direction.



“BATTWEAK”- Displayed in conjunction with the LOW BATTERY annunciator to indicate a weak 

battery condition in the End Unit.



“REPLBATT”  - Displayed in conjunction with the LOW BATTERY annunciator to indicate that the 

battery in the End Unit must be replaced at the next scheduled stop.