Specifications
Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 72 of 118
This document is uncontrolled when printed.
If the test failed due to one of EPROM error, CPU error, RAM chip U6
error, RAM chip U7 error, or Expression error then replace the main
box.
If the test failed due to a LOG error then copy all of the event log onto
the PC, clear the log and reset the I/O Board.
If the test failed due to SYSTEM fault not cleared then
if the software version is prior to R3.3b then the cause may be due
to the CLOCK, BATTERY analogue input, an Expression error (also
indicated by a flashing LED 1), or Faulty Battery test outputs.
if the software version is R3.3b or later then the cause of the
System Warning has been cleared. Examine the event log to
identify the probable cause.
Take the appropriate action for the probable cause.
If the test failed due to Clock stopped then reset the date and time and
reset the I/O Board. If the problem remains then replace the main box.
If the test failed due to Invalid Battery analogue input then use the
Display IO states command to check the battery voltage. If it is less
than 1 volt or reading zero than the ADC module is not working
correctly. Check the internal +12V DC supply rail, check for external
shorts on the current sensor supply terminals, check internal wiring to
the level crossing monitor unit. If no faults are found than replace the
ADC card or the entire monitor.
If the test failed due to Faulty Battery test outputs then reset the I/O
Board. If this clears the problem then report its occurrence to Signal
Engineering. If the problem remains then replace the main box.
5.3.10 Monitor indicates a Warning
Check the conditions which would cause a Warning. These are detailed
in section 2 for the generic expressions. You should also check the
expressions for the particular crossing.
Examine log to determine exact cause.
5.3.11 Unable to communicate with the monitor locally
Check that the monitor Serial Port B and the PC serial port are set for
the same speed
If unable to establish a connection with port B, try connecting to serial
port A.
Confirm that LED3 on the I/O board is not lit. If LED3 is lit than the
monitor may be trying to report a status change or event change. Try
resetting the monitor and attempt to obtain communications and