Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 102 of 118
This document is uncontrolled when printed.
8.2.5 Connection status
A connection status log entry identifies when someone has either remotely
or locally connected or disconnected a computer to the level crossing
monitor.
Examples of the connection status of a serial port changing is:
Wed 06-04-94 22:09:09.4 Serial Port A connected Wed 06-04-94
22:10:27.4 Serial Port A disconnected
8.3 Analysis
Analysis of multiple log entries requires a knowledge of the Boolean
expressions with which the level crossing monitor has been configured.
An example is the following set of log entries:
Tue 08-03-94 10:43:37.2D 16 LOW_BATT
Tue
08
-
03
-
94
10:43:37.2
D
58
NO_LX_FAULT
Tue
08
-
03
-
94
10:43:37.2
D
61
BATTERY
Tue
08
-
03
-
94
10:43:37.2
I
20
* DO FAULT
_
The input LOW_BATT has become false. This caused the
Intermediate variable *DO_FAULT to become true due to the Boolean
expression upon which *DO_FAULT is based. This in turn caused
the output NO_LX_FAULT to become false which is indicated on the
front panel of the monitor and also is reported to the Control Centre.
The input LOW_BATT has become false also caused the output
BATTERY to become true due to its Boolean expression. BATTERY
is used to indicate the type of fault that has occurred.
Note that the because all the events occurred in the same 0.25 scan
the order in the log is based on the scan order and not the order in
which the events occurred.
An extract for a typical level crossing operation is as follows:
Wed 15/06/94 07:05:50.7 D 2 DXT 0
Wed 15/06/94
07:05:50.7
D
7
XR 0
Wed 15/06/94
07:05:50.7
D
8
XPR 0
Wed 15/06/94
07:05:50.7
I
10
*LAMPS_ON 1
Wed 15/06/94
07:05:50.7
I
13
*TRACK_UP 0
Wed 15/06/94
07:05:53.4
A
4
CS_LAMPS FU 3
Wed 15/06/94
07:05:54.2
A
2
SS_LAMPS FD 4
Wed 15/06/94
07:05:54.2
A
4
CS_LAMPS FD 3
Wed 15/06/94
07:05:54.9
A
2
SS_LAMPS
FU 4
Wed 15/06/94
07:05:58.7
A
0
Battery 13.83 Volts
Wed 15/06/94
07:06:10.6
T
16
NORM_APP_T 1
Wed 15/06/94
07:06:21.6
D
3
XT 0
Wed 15/06/94 07:06:21.6 I 15 *DOWN_TRAIN 1
Wed 15/06/94
07:06:21.9
D
6
DDSR 1
Wed 15/06/94
07:06:23.1
D
4
UXT 0
Wed 15/0
6/94
07:07:00.4
D
3
XT 1
Wed 15/06/94
07:07:00.6
D
2
DXT 1
Wed 15/06/94
07:07:00.9
D
7
XR 1
Wed 15/06/94
07:07:00.9
D
8
XPR 1
Wed 15/06/94
07:07:00.9
I
10
*LAMPS_ON 0
Wed 15/06/94
07:07:01.1
A
2
SS_LAMPS FU 0
Wed 15/06/94 07:07:01.1 A 2 SS_LAMPS FD 0