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

mm is the month in which the event occurred. This is formatted as 01 is January,

to 12 is December.

yy is the year in which the event occurred. This is formatted such that numbers

greater than 91 refer to the year 1992 etc., and years less than 92 refer to

the years 2000 etc.

hh is the hour of the day that the event occurred in 24 hour format.

mm is the minutes at which the event occurred.

ss is the seconds at which the event occurred.

f is fractions of a second at which the event occurred with a 0.25 second

resolution.

TYPE defines the type of log entry.

NUMBER This is a number which starts at one for each type. It relate the log entry to

external input, output, the internal logic that controls the event.

NAME This is the name of the external input, output, or internal logic for which the

event occurred.

STATE This is the state to which the external input, output, or internal logic for which

the event occurred has changed too.

Note that the Level Crossing monitor scans all of its inputs once every 0.25 seconds.

Therefore any log entries that have a time stamp that matches to the fraction of a second

occurred in the same scan. This means that the order log entries for which the time

stamps match only identifies the order in which they were scanned and not the order in

which they occurred.

The date and hours for each log event are stored as separate entries in the log. This may

cause the oldest log entries to lose the date and 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.

7.2 Log entry types

7.2.1 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 4 UXT 0

Wed 06-04-94 22:10:27.4 D 4 UXT 1