Specifications

RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

4.3.8 Monitor indicates a Fault

Check the conditions which could cause a Fault 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.

4.3.9 Monitor indicates a SYS Fault

Connect to the monitor with a PC and request System Test.

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.

4.3.10 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.

4.3.11 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 disable the reporting of status and event changes. If still