Specifications

RailCorp Engineering Manual — Signals — Equipment Manual
Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261
© RailCorp Page 72 of 89
Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1
Alternate number 19 characters which give the alternative phone number in
Hayes AT command format, that the monitor dials to
report a status change. These are the digits 0 to 9, and
dial modifiers ‘,’ for a pause, ‘P’ for pulse dialling, and ‘T’
for tone dialling. It is recommended to always start the
number with a pause.
Report Changes PortA Either ENABLED or DISABLED. If ENABLED the monitor
reports any changes of state via serial port A. It is
cancelled by loss of Carrier Detect (CD), or the abort
command.
Report Changes PortB Either ENABLED or DISABLED. If ENABLED the monitor
reports any changes of state via serial port B. It is
cancelled by loss of Carrier Detect (CD), or the abort
command.
Dial on fault PortA Either ENABLED or DISABLED. If ENABLED the monitor
report any changes of status to either the normal or
alternate phone numbers via the modem connected to
serial port A.
Maintenance Disable Either ENABLED or DISABLED. If ENABLED the
maintainer can temporarily disable the Dial of Fault via a
5 second press of the Reset Fault and Warning button
while maintenance is carried out.
Battery offset An offset in the range of 0.0 to 0.5 volts to correct the
battery voltage read by the monitor. Nominally 0.16. The
value displayed may not be the same as the value
entered due a conversion in the monitor software for the
A to D. If the value is changed it will be lost when the
monitor restarts and the original fixed value is read from
EPROM.
Modem initialisation string This holds the configuration string for the particular
modem. It may be up to 49 characters long. Refer section
3.8 for details of typical modem initialisation strings.
Operations pin number 5 characters. Normally digits. It is used to protect certain
functions.
Maintenance pin number 5 characters. Normally digits. It is used to protect certain
functions.
Serial port set-up port A This 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.