Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 65 of 118
This document is uncontrolled when printed.
Reset button or at pre-programmed interval after activation. Normally this
time-out is set at 45 minutes.
At the completion of the maintenance tasks all Faults and Warnings
must be cleared before cancelling this mode otherwise they will be
reported to the Control Centre. The maintenance disable state is
cleared by a 0.5 second press of the Fault reset button.
When investigating level crossing faults and using the monitor it is
important to download the event log to disk before erasing/deleting
the event log.
4.4 Incident Investigation
The following actions are to be taken in the event of an incident at a
level crossing which has an operational level crossing monitor:
1. Do not disturb the monitor. Note the state of all indicators on the
front panel of the monitor.
2. Make a physical inspection of the monitor and interface equipment.
3. If the monitor is physically damaged priority is to be given to
recovery of the large DALLAS IC's in positions U6 and U7 on the
SCADA 2000 A I/O Board. If these IC's are recovered intact then
the log may be retrieved and analysed by Signal Engineering.
The EPROM in U5 should also be retrieved if possible.
4. If the monitor is undamaged and operating correctly than
connect a portable PC to the monitor and capture a full copy of
the event log on the PC.
5. Note the accuracy of the monitors time and date.
6. Reset any alarms or warnings.
7. Examine the log for the time of the incident.
8. Perform any tests required to prove or disprove that the monitor
is functioning correctly. This may be best performed by repeating
the commissioning tests.
9. Check that both used and unused inputs and outputs are shown
by the monitor to be in their actual state. Inputs are to be
corresponded to the monitor. This is best done by enabling
reporting changes on the appropriate serial channel and watching
the changes occur on the PC screen when the inputs states are
changed. Cause each input to change to both possible states in
turn. This must be done by energising or de-energising the relays
etc. For example pull the negative pin for the XR. Then restore it.
Note that additional changes will occur and the tests need to be
structured to correspond each event.