Faults With Priority.1:
- The action to be taken is entirely clear.
- The action to be taken must be initiated immediately.
- A protective action is initiated (VCB OFF)
- BPFA will glow.
- LSFI will flicker.
- Priority-1 message will display on screen
Faults With Priority-2:
- The action to be taken is not entirely clear.
- The action to be taken does not have to be initiated immediately.
- The faults can be remedied manually by driver.
- BPFA will glow. - Priority-2 message will appear on screen.
Note: -
If a fault message appear on the screen, the yellow illuminated push button “BPFA” lights up. If this is fault of priority-1, the red indication lamp ”LSFI” starts flashing at the same time.
- If a fault message with priority-1 is displayed, a fault message with priority-2 is suppressed on the screen.
- A fault message with priority-2 remains on the screen until it is overwritten by a fault message with priority-1 or by subsequent fault with priority-2.
Isolation Of Sub System:
A constant priority-1 fault or priority-2 fault which occurs twice within one 30 minutes period causes the appropriate subsystem to be isolated.
If sub-system has been isolated it does not issue any more fault message and signals. Only LSFI remains glowing.
Acknowledgement Of Fault Message:
Priority-1
If a priority-1 fault occurs the fault message must be acknowledged before the loco can travel further, If the train driver fails to acknowledge, the protection measures introduced remain in force. The fault is not remedied. Fault message can be acknowledge by pressing BPFA, if after acknowledgement LSFI extinguish then it indicates now loco is normal, but if LSFI glow continuously it indicates isolation of concerned sub-system.
Priority-2:-
They are also acknowledged by pressing BPFA. Even if this acknowledgement is not forthcoming, the locomotive is still able to operate. The fault message still remains visible on the screen until it is over written by a fault message with priority-1 or by subsequent fault with priority-2.
Indication And Recognition Of Faults
Illuminated push button ( BPFA):
Fault indication/fault acknowledgement (Yellow) On occurrence of any fault, the illuminated push button for fault acknowledgement will light up and fault message will appear on the display. The driver is required to acknowledge the fault through the push button. On acknowledgement, the lamp of acknowledgement push button will go off and the display will be cleared.
Fault status lamp (Red) ( LSFI) :
In case of priority-1 fault, the fault status lamp will start blinking additionally. On acknowledgement of fault, the lamp will be off but if there is an isolation of a subsystem persisting, then the lamp will continue to glow.
Automatic display of diagnosis messages
If a fault occurs that needs to be transmitted to the driver by means of a diagnosis message, such message will be displayed immediately. At the same time, the illuminated push-button for fault acknowledgement will light up. All diagnostic messages shall be acknowledged by the driver through the fault acknowledgement push button (BPFA). On acknowledgement, the lamp of acknowledgement push button will go off and the display will be cleared. In case of priority-1 fault, the fault status lamp (LSFI) will start blinking additionally. On acknowledgement of fault the lamp will be off but if there is an isolation of a subsystem persisting, the lamp will continue to glow. If the driver fails to acknowledge priority 1 fault, then the loco is shut down. If the driver fails to acknowledge faults of priority-2 then the fault message will remain on the display screen, unless it is overwritten by a fault message of priority-1 or priority-2 another cab.
The fault or isolation messages include following information:
• Locomotive number on which the fault or the subsystem isolation respectively occurred
• Name of subsystem being affected (SSO1 to SS19)
•Type of fault/subsystem isolation and related consequences
• Instructions to the engine driver
STATUS CODE
Display Of Subsystem Status
By means of keyboard entry, the driver can display the status of all subsystems of all locomotives within the train composition. Different display levels furnishing more or less detailed information are provided:
• Survey of all locomotives within the train composition: the status of each individual locomotive is indicated by a two-digit numerical code.
• Survey of all subsystems within one locomotive: the status of individual subsystem is indicated by a two-digit numerical code.
Browse Of Status Messages On Request
All diagnosis messages that appeared at the display since the last activation of the control system may be repeated on request. In this way, the relieving operating personnel is kept informed on the status of the vehicle. If the train composition consists of two locomotives, the driver can select the locomotive that he wants to process first.
Diagnosis Messages-There is three types of messages displayed to the driver on the display unit in the cab:
1. Information messages
2. Fault messages
3. Isolation messages
