Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 93 of 118
This document is uncontrolled when printed.
Maintenance pin number 5 characters. Normally digits. It is used
to protect certain functions.
Serial port set-up port AThis is the configuration of the RS232 serial
port A. It is always 8 data bit, No parity, and a bit rate. The serial
protocol used requires that it is 8 data bits. AT compatible modems
will not handle parity with 8 data bits. The bit rate is one of 1200,
9600, and 19200. Normally set for 9600.
Serial port set-up port B This is the configuration of the RS232 serial
port B. It is always 8 data bit, parity, and a bit rate. The serial protocol
used requires that it is 8 data bits. Parity is Odd, Even, or None. None
is normally chosen. The bit rate is one of 1200, 9600, and 19200.
19200 is normally set.
Lamp Offsets The lamp offset is used to compensate for variations in
the lamp currents at particular locations. On each lamp circuit their
are two values. One labelled FU (Flasher Up, flasher contact 12 and
11 made), and one labelled FD (Flasher Down, flasher contact 12 and
13 made). The lamp learn offsets are limited to greater than -10.0 and
less than +10.0. Negative offsets are due to lamp currents that are
less than expected. Positive offsets are due to lamp currents that are
greater than expected. Both FU and FD values should be within 2
counts for flashing lamps. Only the FU value is used for steady lamps.
Offsets are normally set using Lamp learn but may be manually
adjusted.
7.2 Customising Generic expressions
A set of generic configuration data files have been created. These are
called generic.cfg, generic.io, and generic.exp. When the data files
need to be defined for a new Level Crossing these generic files are
copied as file names having a unique identifier for the particular level
crossing. A batch file has been created for this purpose. It is invoked
by the DOS command line "NEWEXP name" or in “Cerberus’ with a
menu selection. Please note that the name chosen must be 8
characters or less without spaces.
e.g. typing in >newexp name
The specific configuration data files are then edited using any TEXT
file editor or word processor. If you are using a word processor such
as Word 6.0 for Windows you need to make sure that the edited file is
saved as a ‘Text Only’ file.
Edit the new ".io" file for the crossing. Change the title of the file from
generic.io to your chosen name name.io. Also update the date and
comments section so that a record is kept of modifications made to
the file. Either delete the line starting with ";;" if these inputs or
variables are not applicable to the particular crossing, or delete the ";;"
to make them applicable. They mostly relate to booms. Check the