Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 99 of 118
This document is uncontrolled when printed.
hours information. When this occurs log entries similar to the following
will occur for the oldest hour of the log:
??? 00-00-91 00:09:58.6 D 3 XT 1
All the information is correct with the exception of the hours of the day,
day of the week, and date.
8.2 Log entry types
8.2.1 Digital inputs and Outputs
A log entry type of "D" means that the log entry is for a digital input or
digital output. Numbers in the range of 1 to 56 are inputs. Numbers in
the range 57 to 64 are outputs.
The state for inputs is either "0" or "1 ". "0" means that the input is OFF.
Normally this indicates that the relay or device being monitors is now in
the down or de-energised state. "1" means that the input is ON.
Normally this indicates that the relay or device being monitors is now in
the up or energised state. If the name is prefixed by "NOT_" then the
input state represents the inverse of the normal case.
Examples of an input changing state are:
Wed 06-04-94 22:09:09.4 D 4UXT 0
Wed 06-04-94 22:10:27.4 D 4UXT 1
The state for outputs is either "0" or "1 ". "0" means that the output is
OFF. "1" means that the output is ON. If the name is prefixed by "NO_"
then the output state represents the inverse of the sense.
Examples of an output changing state are:
Tue 08-03-94 10:40:26.7 D 63LOGIC 0
Mon 14-03-94 15:18:48.2 D 63LOGIC 1
8.2.2 Intermediate variables
A log entry type of "I" means that the log entry is for an Intermediate
variable. Numbers in the range of 1 to 10 are special Intermediate
variable which are controlled by the Level Crossing Monitor software.
Numbers in the range 11 to 32 are Intermediate variables which are
controlled by Boolean expressions.
The state for Intermediate variables is either "0" or "1 ". "0" means that
the Intermediate variable is OFF or has a logical state of FALSE. "1"
means that the Intermediate variable is ON or has a logical state of
TRUE.
Examples of an Intermediate variable changing state are:
Wed 06-04-94 22:09:09.4 I 10 *LAMPS_ON
Wed 06-04-94 22:10:27.4 I 10 *LAMPS_ON
8.2.3 Timers
A log entry type of "T" means that the log entry is for an Timer variable.
Numbers in the range of 1 to 3 are special Timer variables