Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 73 of 118
This document is uncontrolled when printed.
disable the reporting of status and event changes. If still unsuccessful than
try all possible combinations of serial port speeds on both serial port A & B
in case the serial ports were inadvertently set for the wrong speed..
5.3.12 Unable to communicate with the monitor remotely
Check that modem power lights are on and that all cables are
connected correctly.
Check phone line using a plug in phone to check the line for
operation and for noise.
Check serial port set-up for port A and that it is correct for the
modem being used.
Turn monitor off then on with modem connected. This will re-
initialise the modem.
5.3.13 LEDs on the SCADA card not behaving normally Turn off the Monitor and
turn it on again.
Check the 5 volt supply. Measurement on the Output Optoisolator
test pins is the easiest. If it is between 4.0 and 4.8 volts then turn off
then monitor, remove the top cover, unplug and re-plug the power
supply connectors. If below 4.0 volts replace the main box.
If the 5 volt supply is okay and the problem persists then replace the
main box.
5.3.14 Monitor restarting unexpectedly
The symptoms of this are START and STOP entries in the log and
possibly the I/O board has stopped operating with LED1 flashing
(indicating too many restarts in the last 5 minutes)
Check the 5 volt supply. Measurement on the Output Optoisolator
test pins is the easiest. If it is between 4.0 and 4.8 volts then turn off
then monitor, remove the top cover, unplug and re-plug the power
supply connectors. If below 4.0 volts replace the main box.
5.3.15 Clock stopped or showing invalid time
Reset the time. If this does not fix the problem then either replace
the IC in U7 of the SCADA board in the main box or replace the main
box.
The cause is either due to power supply or pre version 3.3 software.
Check the 5 volt supply. Measurement on the Output Optoisolator
test pins is the easiest. If it is between 4.0 and 4.8 volts then turn off
then monitor, remove the top cover, unplug and re-plug the power
supply connectors. If below 4.0 volts replace the main box.