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Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 27 of 118
This document is uncontrolled when printed.
2. If serial port A transmit interrupt then if there are characters to
transmit, send the next one, otherwise clear the interrupt.
3. If serial port A external status interrupt then turn on led 6 and check
the state of carrier detect. If it is on, set the port A communications
link flag, and enable RTS, CTS flow control. If it is off, clear the port
A communications link flag, store the connection lost time, and
disable RTS, CTS flow control. Reset the external status interrupt.
4. If a serial port B receive interrupt occurred then turn led 5 on, check
for and process any reception errors, and process the received
character.
5. If serial port B transmit interrupt then if there are characters to
transmit, send the next one, otherwise clear the interrupt.
6. If serial port B external status interrupt then turn on led 6 and check
the state of carrier detect. If it is on, set the port B communications
link flag, and enable RTS, CTS flow control. If it is off, clear the port
B communications link flag, store the connection lost time, and
disable RTS, CTS flow control. Reset the external status interrupt.
Else if their has been no serial port interrupt for 1 second, then check
the transmission/reception state for each serial port and if they are not
idle take the necessary corrective action.
3.2.2.4 Configuration & Set-Up
A specific EPROM is prepared and labelled for the particular level
crossing. The EPROM is inserted in U5. The EPROM must be type
27512 running at 200nS or better.
A DALLAS DS1235YWL 200nS or better is inserted in U6. A DALLAS
DS1244Y 200nS or better is inserted in U7.
The links for the board must as follows (all others shall be open circuit,
that is removed):
1
-
2
3
-
4
5
-
6
7
-
8
10
-
11
12
-
13
17
-
18
19-20 25-26 27-28 29-30 31-32 33-34 37-38
39
-
40
43
-
44
47
-
48
49
-
50
51
-
52
53
-
54
55
-
56
59
-
6
0
85
-
86
87
-
88
89
-
90
95
-
96
105
-
106
107
-
108
Drawing M08-781 SCADA-2000 A/2.0 I/O Board jumper allocations
(marked up for LX monitor) shows the location and setting of the links.
3.2.2.5 Troubleshooting
Check the LED indications on the I/O Board for correct operation (see
section above).
Check 5 volt supply is greater than 4.75 volts and less than 5.25 volts. It
is easiest to check this on the input or output Optoisolator board test
pins.
- Engineering Standard –NSW 1
- Signalling 1
- Disclaimer 2
- Document Approval 2
- Document Supply and Control 2
- Copyright 2
- About This Publication 3
- Document History 4
- Table of Contents 5
- 1. Introduction 9
- 2. Overview 9
- Signalling SMS 02 10
- 2.3 Logging 13
- 2.4 Status Reporting 13
- 2.5 Digital Inputs 15
- 2.6 Digital Outputs 16
- 2.7 Analogue inputs 17
- 2.8 Battery Testing 18
- 2.9 Configuration 19
- 3.1 General 20
- 3.2 Main Box 22
- 3.3 Current sensor 32
- 3.5 Input Optoisolator 37
- 3.6 Output Optoisolator 41
- 3.7 Cables 46
- 3.8 Modem 47
- 3.9 Telephone line 50
- HG2-SF Base. Top V 53
- 3.11 Battery test resistor 54
- 349.234 km 55
- Please quote ID 004 55
- 4.1 Maintenance Tasks 56
- 4.2 Tools and Maintenance 64
- 4.3 Maintenance Instructions 64
- 4.4 Incident Investigation 65
- 5. Fault Diagnosis 66
- 6. Installation 74
- 6.2 Equipment Installation 76
- 6.3 Hardware Configuration 76
- 6.4 Commissioning Procedure 77
- Fault Diagnosis 79
- 7. Data Configuration 81
- “000 Generic 84
- Rd 000.00 07/09/94” 84
- 7.1.2.7.1 AND Operator 85
- 7.1.2.7.2 OR Operator 85
- 7.1.2.7.3 NOT Operator 86
- * VOLTAGE =A 5 VOLTS 5 91
- *CURRENT =A 6 AMPS 20 91
- *TEMPERATURE =A 7 TEMP 100 91
- 7.3 Data Generation 95
- 7.4 EPROM programming 95
- 8. Log Interpretation 98
- 8.2 Log entry types 99
- 8.3 Analysis 102
- 8.4 Spurious events 103
- Appendix A 105
- Generic Configuration data 105
- File ____ GENERIC.IO 106
- ; Level Crossing 106
- File _____GENERIC.exp 109
- ; Syntax Description 109
- .16 as this is typical 111
- Commissioning Form 112
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