interfaces between signalling and control systems
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Specification
Interfaces Between Signalling And Control Systems
Version: 1.0
Issued date: 12 June 2015
Important Warning This document is one of a set of standards developed solely and specifically for use on public transport assets which are vested in or owned, managed, controlled, commissioned or funded by the NSW Government, a NSW Government agency or a Transport Agency (as defined in the Asset Standards Authority Charter). It is not suitable for any other purpose. You must not use or adapt it or rely upon it in any way unless you are authorised in writing to do so by a relevant NSW Government agency. If this document forms part of a contract with, or is a condition of approval by a NSW Government agency, use of the document is subject to the terms of the contract or approval. This document may not be current. Current standards are available for download from the Asset Standards Authority website at www.asa.transport.nsw.gov.au. © State of NSW through Transport for NSW
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Standard governance
Owner: Lead Signals and Control Systems Engineer, Asset Standards Authority
Authoriser: Chief Engineer Rail, Asset Standards Authority
Approver Director, Asset Standards Authority on behalf of the ASA Configuration Control Board
Document history
Version Summary of Changes
1.0 First issue
For queries regarding this document, please email the ASA at [email protected] or visit www.asa.transport.nsw.gov.au
© State of NSW through Transport for NSW
T HR SC 01250 SP Interfaces Between Signalling And Control Systems
Version: 1.0 Issued date: 12 June 2015
Preface The Asset Standards Authority (ASA) is an independent unit within Transport for NSW (TfNSW)
and is the network design and standards authority for defined NSW transport assets.
The ASA is responsible for developing engineering governance frameworks to support industry
delivery in the assurance of design, safety, integrity, construction, and commissioning of
transport assets for the whole asset life cycle. In order to achieve this, the ASA effectively
discharges obligations as the authority for various technical, process, and planning matters
across the asset life cycle.
The ASA collaborates with industry using stakeholder engagement activities to assist in
achieving its mission. These activities help align the ASA to broader government expectations
of making it clearer, simpler, and more attractive to do business within the NSW transport
industry, allowing the supply chain to deliver safe, efficient, and competent transport services.
The ASA develops, maintains, controls, and publishes a suite of standards and other
documentation for transport assets of TfNSW. Further, the ASA ensures that these standards
are performance-based to create opportunities for innovation and improve access to a broader
competitive supply chain.
This document describes the interface requirements between the signalling system and the
signalling control system.
This document has been developed from the RailCorp specification SPG 1250 Interfaces
between Signalling and Control Systems and has been reviewed and approved by the Asset
Standards Authority.
This ASA specification T HR SC 01250 SP replaces SPG 1250.
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Table of contents 1. Introduction .............................................................................................................................................. 5
2. Purpose .................................................................................................................................................... 5 2.1. Scope ..................................................................................................................................................... 5 2.2. Application ............................................................................................................................................. 5
3. Reference documents ............................................................................................................................. 5
4. Terms and definitions ............................................................................................................................. 6
5. Overview ................................................................................................................................................... 6
6. Indication and control states .................................................................................................................. 7 6.1. Indications .............................................................................................................................................. 7 6.2. Controls .................................................................................................................................................. 7
7. Hardware interface .................................................................................................................................. 7 7.1. Equipment types .................................................................................................................................... 8 7.2. Telemetry equipment ............................................................................................................................. 8
7.2.1. SCADA 2000 .......................................................................................................................................... 8
7.2.2. Dupline .................................................................................................................................................... 9
7.2.3. IMAC ...................................................................................................................................................... 10
7.2.4. Kingfisher .............................................................................................................................................. 10
7.3. Computer based interlockings ............................................................................................................. 11 7.3.1. SSI ......................................................................................................................................................... 11
7.3.2. Westlock ................................................................................................................................................ 11
7.3.3. Microlok ................................................................................................................................................. 12
7.4. Electrical isolation ................................................................................................................................ 12 7.4.1. Relay based systems .......................................................................................................................... 12
7.4.2. Computer based systems ................................................................................................................... 12
8. Interface properties ............................................................................................................................... 12 8.1. Naming convention .............................................................................................................................. 13 8.2. Combining of inputs ............................................................................................................................. 14
9. Expected indications and controls ...................................................................................................... 14
10. Spare indications or controls ............................................................................................................... 14
11. Allocation of indications and controls ................................................................................................ 15
12. Documentation of interface .................................................................................................................. 15
Appendix A Indications .......................................................................................................................... 16
Appendix B Controls .............................................................................................................................. 25
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1. Introduction This document has been developed by the ASA based on the RailCorp specification SPG 1250
and has been updated to suit the railway system operated and maintained by TfNSW.
The unit symbols, SI prefixes, and abbreviations shown in this document comply with IEEE
Appendix VII.
2. Purpose This specification describes the interface requirements between the signalling system and the
signalling control system. The requirements detailed in this document do not reduce any
requirements of the signal design principles (ESG 100) or standards.
2.1. Scope For new interlockings this document shall be used as the interface requirements to the
signalling control system. The interlocking design is expected to follow the naming convention
and the meaning of the indications and controls as defined in this document.
For existing interlockings this document is intended to be used as the requirements for the
signalling interface design if it is modified for remote control.
For some installations a separate maintenance system may be provided to capture diagnostic
indications for maintainers. When this is provided, a reduced set of indications may be provided
to the signalling control system. When this occurs, the interface is to be documented as
described in Section 12. Mandatory indications and controls for the signalling control system are
noted in Appendix A and Appendix B respectively.
2.2. Application This document applies to the heavy rail network operated and maintained by TfNSW.
3. Reference documents The following documents are cited in the text. For dated references, only the cited edition
applies. For undated references, the latest edition of the referenced document applies.
International standards
IEEE Appendix VII Recommended Unit Symbols, SI Prefixes, and Abbreviations
Australian standards
Nil
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Transport for NSW standards
ESG 007 Glossary of Signalling Terms
ESG 100 Signal Design Principles
SDG 001 Standard Signalling Circuits
SPG 1230 Design of Microlok II Interlockings
SPG 0703 Signalling Documentation and Drawings
Legislation
Nil
Other references
SSI 8003 10 SSI Data Preparation Interlocking Railtrack PLC
4. Terms and definitions For signalling related terms and definitions see ESG 007.
The following terms and definitions apply in this document:
Rail Corporation New South Wales (RailCorp) From 1 January 2004 until 30 June 2013,
RailCorp provided metropolitan passenger rail services via CityRail and long distance services
via CountryLink. RailCorp also owned and maintained the metropolitan rail network and
provided access to freight operators in the metropolitan area.
5. Overview Figure 1 shows the interface between the signalling system and the signalling control system.
Figure 1 – Interface overview
In this document ‘the interface’ refers to the interface between the signalling system and
signalling control system unless otherwise specified.
Signalling System (Vital interlocking system –
usually trackside)
Signalling Control System (Non-vital system – usually
centralised)
Interface between signalling system and signalling control system
Communications link
Signaller
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The physical interface usually takes the form of a serial communications link between field
located interlocking equipment, and a remotely located control system.
This document identifies the types of signalling systems and interface equipment that the
signalling control system connects to. It also defines the logic states of the indications and
controls in terms of the electrical interface or protocol.
6. Indication and control states This section defines the states of indications and controls that shall be used by the signalling
control system.
6.1. Indications The signalling control system is required to be able to display each state as ON, OFF or
UNKNOWN.
Where failure of the signalling equipment or components of the signalling equipment or
telemetry equipment cannot be determined entirely from the communications link, equipment
health indications shall be provided. For example if a Microlok field slave fails then the
indications received from the Microlok master will need to be marked as unknown by the control
system. A Slave_OK indication is required to achieve this, see Cardfile OK in Appendix A.
Health indications shall be associated with the indications they affect.
Health indications shall be processed before changes to their affected indication bits by the
control system.
6.2. Controls The signalling control system states of signalling controls shall be:
• Steady OFF
• Steady ON
• Pulse ON – The output is set to ON then OFF
• Pulse OFF – The output is set to OFF then ON
The type of control and the duration of the pulse shall depend on the hardware interface. See
Section 7.
7. Hardware interface This section identifies the connection details for the signalling system and relates the physical
interface to the states of the signalling control system indications and controls.
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7.1. Equipment types The signalling control system interfaces shall include the capability to interface to signalling
systems of the following interlocking types:
• Relay
• Microlok
• SSI and Westlock
The signalling control system interfaces to relay interlocking shall include the following types of
telemetry equipment:
• SCADA 2000
• Dupline
• IMAC
• Kingfisher Telemetry Systems
The signalling control system interfaces to signalling ancillary systems may also include the
types of equipment listed below:
• power supply equipment – rectifiers, switch mode supplies, uninterruptible power supplies
(UPS) including bypass on line, on battery and so on, emergency change over contactors
(ECOs), earth leakage detectors (ELDs), miscellaneous indications – voltage free relay
contacts
• air compressor systems – control PLCs, pressure switches, compressor alarms and
miscellaneous indications – serial data, USB or voltage free contacts
• fire alarms
• data Link switches, routers
• trackside monitoring (for example; dragging gear detection, and so on)
7.2. Telemetry equipment The wiring connections from any telemetry system to the signalling system shall be included in
the signalling design circuits.
7.2.1. SCADA 2000
The SCADA 2000 is a telemetry system, which can be duplicated to improve availability. The
connections to the interlocking are via optoisolator boards.
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Indications
The input circuit may be a single contact, or a logic circuit of a number of contacts.
The signalling control system shall detect indications as:
• ON: when the input circuit is closed and the required voltage is applied to the input terminal
• OFF: when the input circuit is open
• Vital indication optoisolators (VIO) may be used where an intermediate point of a vital
circuit is required as an input, such as for RUZR indications. A circuit including the VIO
then drives an input optoisolator as per conventional inputs.
Indication conditioning
Indication conditioning is set by the signalling control system; there are no hardware interface
requirements for indication conditioning.
Controls
Controls shall have the following effect on outputs:
• Steady ON: current is allowed to flow
• Steady OFF: no current is allowed to flow
For Pulse ON controls the output is set to ON and after one second set to OFF. This conversion
is performed by the SCADA 2000 system. Pulse OFF controls are handled similarly.
Controls are only set ON by the master side. For the Standby side all controls are set OFF. On
a change of mastership there will be an overlap where both sides are master to ensure that the
signalling control outputs do not drop out.
7.2.2. Dupline Dupline is a telemetry system, which can be duplicated to improve availability.
Indications
The input circuit may be a single contact, or a logic circuit of a number of contacts.
Indications shall be detected as:
• ON: when the input circuit is closed and the required voltage is applied to the input terminal
• OFF: when the input circuit is open
Indication conditioning
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A hard-wired health indication shall be supplied per input module.
This input is wired directly to the indication bus voltage. If there is a failure of the module then all
indications from the module will be set OFF, including the health indication. When this is
detected all other inputs from the module are made UNKNOWN.
Dupline has two failure modes ‘ALL ON’ and ‘ALL OFF’ with only the ‘ALL OFF’ failure mode
being alarmed.
Controls
No control shall be issued using Dupline telemetry systems.
7.2.3. IMAC IMAC is a telemetry system, which can be duplicated to improve availability.
Indications
IMAC input modules use a sense current to determine if the input circuit is closed. For this
reason one circuit or contact cannot be used for duplicated inputs. Two contacts or duplicated
input circuits are to be used for duplicated system. The input circuit may be a single contact, or
a logic circuit of a number of contacts.
Indications shall be detected as:
• ON: when the input circuit is closed
• OFF: when the input circuit is open
IMAC input modules can be configured to invert the logic sense of the inputs using DIP
switches. This feature is not used.
Controls
No control shall be issued using IMAC telemetry systems.
7.2.4. Kingfisher
Kingfisher is a telemetry system that which can be duplicated to improve reliability.
Indications
The input circuit may be a single contact, or a logic circuit of a number of contacts.
Indications shall be detected as:
• ON: when the input circuit is closed and the required voltage is applied to the input terminal
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Controls
Use of controls through Kingfisher is permissible in accordance with Section 7.2.1 above;
however, receipt on both sides may be required for the application.
7.3. Computer based interlockings Computer based interlockings are described below.
7.3.1. SSI The signalling control system shall interface to SSIs via a serial communications link using the
BR1631 and BR1922 protocols.
The connection point shall be the RS422 ports provided by the Panel Processor Modules
(PPM). Each SSI cubicle has two PPMs with one RS422 port per PPM for the interface.
Indications
Indications are received via the protocol. The indication values shall be:
• ON: SSI value of TRUE which is indicated by a ‘1’ in the protocol message
• OFF: SSI value of FALSE which is indicated by a ‘0’ in the protocol message
Controls
Requests shall only be sent by the master signalling control system side. On a change of
mastership there will be an overlap where both sides are master.
Control values sent via the protocol are set to:
• ON: SSI value of TRUE which is indicated by a ‘1’ in the protocol message
• OFF: SSI value of FALSE which is indicated by a ‘0’ in the protocol message
7.3.2. Westlock The signalling control system shall interface to Westlock interlockings via a serial
communications link using the RT/E/S/17503 protocol.
The connection point shall be the RS422 ports provided by the control system gateways (CSG).
Each Westlock system has two CSGs. Each CSG can have multiple addresses with one RS422
port per address on each CSG.
The RT/E/S/17503 protocol is identical to the SSI BR1631 protocol. See Section 7.3.1 for
definitions of Indications and Controls.
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7.3.3. Microlok
The signalling control system shall interface to Microlok interlockings via serial communications
links using the Genisys protocol. Two Genisys links shall be provided.
Indications
The values of the indications received via the protocol shall be:
• ON: Microlok value of TRUE which is indicated by a ‘1’ in the protocol message
• OFF: Microlok value of FALSE which is indicated by a ‘0’ in the protocol message
Controls
Controls values sent via the protocol are set to:
• ON: Microlok value of TRUE via a ‘1’ in the protocol message
• OFF: Microlok value of FALSE via a ‘0’ in the protocol message
Where Microlok requires controls to be pulsed ON or OFF, the duration shall be configurable in
the signalling control system. The duration will typically be set to one second but shall not be
greater than two seconds.
Controls shall be sent from both the master and the standby signalling control system side.
7.4. Electrical isolation Signalling interlocking equipment shall be electrically isolated from control system equipment or
communication equipment. This is to avoid lowering the electrical integrity of signalling systems
and avoid the transference of electrical surge between systems.
7.4.1. Relay based systems All wiring connected to vital circuits shall conform to railway signalling standards for vital wiring.
Equipment connected to such wiring is subject to type approval to ensure adequate isolation is
provided between the vital and non-vital elements of the system.
7.4.2. Computer based systems All connections between vital computer systems and communication equipment, or control
equipment shall be isolated.
8. Interface properties This section describes the properties of indications and controls.
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8.1. Naming convention The signalling control system I/O naming convention for existing interlockings shall be as per
the function names used in the circuit book or data, with the addition of an interlocking
abbreviation prefix to achieve unique names. The interlocking abbreviation shall be a unique
two letter abbreviation of the interlocking name.
The interlocking abbreviation is not required in the interlocking data. The function names shall
omit all characters that are added to identify repeats. See Standard Signalling Circuits
SDG 001, sheet Z03.
Where multiple copies of the same function are provided to the signalling control systems (for
example; at system interfaces), a suffix of ‘–n’ shall be added where n is the copy number
starting from one. The suffix for the first copy of the function may be omitted; subsequent copies
shall be numbered starting from two.
The naming conventions for SSIs shall be as per the SSI source files. The naming convention is
defined in SSI 8003 10.
For new works the naming convention shall be as defined by this document. The naming
convention of this document follows that of signalling documentation and drawings SPG 0703,
Appendix B, and signalling circuit design standards Standard Signalling Circuits SDG 001,
sheet Z01 and sheet Z02.
In general the indication names may exclude the ‘R’ for relay at the end of the function name.
The ‘R’ shall be omitted where it is commonly omitted in usage such as track circuit indications,
as is done in Microlok data. The naming convention for equipment that is not included in the
above documents shall follow the name used in the signalling circuits or computer based
interlockings data or is a descriptive word in brackets.
For Microlok interlockings the bit names of the Microlok data are often prefixed with their
communications port number, see SPG 1230, section 4.5.3. Where this is the case, the
communications port prefix shall be removed from the name used by the signalling control
system.
The IO names may contain alphanumeric characters (case sensitive) as well as the four
characters ‘- _ ( )’. IO names shall not contain any space characters. The asterisk ‘*’ is reserved
for use by intermediate terms within the signalling control system. The terms ‘TRUE’ and
‘FALSE’ are also reserved.
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8.2. Combining of inputs Inputs shall be provided for each indication separately except where combining of inputs is
required to provide the single required function such as:
• route availability indications
• certain alarm indications as may be agreed on a project basis
9. Expected indications and controls This section identifies the expected indication and control connections that shall be provided by
the signalling system to the signalling control system.
In the table the indications specified for relay and Microlok interfaces are expressed in terms of
relay contacts. For Microlok interfaces ‘contact’ shall mean the functional equivalent.
For SSI the table lists the indications that are required as well as the latches that need to be
provided.
This table represents the usual application. Some installations may vary in the logic required to
provide the function.
For example, some signals may clear without train stop drive.
The Lead Engineer Signals and Control Systems may clarify specific situations upon request.
Where separate diagnostic systems are provided, those indications that are mandatory for the
signalling control system are noted. These may also be provided to the diagnostic system.
The indication listings are shown in Table 1 in Appendix A. The control listings are shown in
Table 2 in Appendix B.
10. Spare indications or controls Controls and indications shall be logically (numerically) arranged in order on the serial links. The
preference is for any new or altered spare indications or controls to be added to the end of any
listing rather than to readjust the predefined order in the bit stream. When the bit listing is
established minor modifications may have the spares at the end utilised for additional bits.
To facilitate the addition of extra bits, the listing shall include the initial allocation of an additional
15% to 20% bits nominated as spare over and above the required bit listing. Typically the
additional spare bits may fill out the capacity of the addressing arrangements.
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11. Allocation of indications and controls All indications and controls related to an item of signalling equipment shall be allocated in one
telemetry system. For example all the IO for a signal including all indications and controls as
well as associated ‘A’ track indication for all routes from the signal shall be allocated to one
telemetry system.
Indications shall be geographically contiguous in one telemetry system, that is; if the signal and
‘A’ track are indicated from system 1 and the ‘B’ track is indicated from the next telemetry (2)
then subsequent track ‘C’, track ‘D’, and so on, shall be indicated from system 2.
12. Documentation of interface For any project implementation, the signal designer shall produce a detailed bit list for the
interface for agreement by the control system designer. When this is agreed, any changes to
the list shall require the agreement of both parties.
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Appendix A Indications Table 1 - Indications
Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Air system Starting of the lag compressor No AIR_LAG_KR Nil
Compressor failure No AIR_FW_KR Nil
Dryer failure (if provided separate from compressor)
No AIR_DF_KR Nil
Activation of any low pressure Mandatory AIR_LP_KR Nil
Activation of any high pressure No AIR_HHH_KR Nil
Loss of either power supply either partially (for example: loss of phase) or completely
No AIR_PSN_KR
AIR_PSE_KR
Nil
Activation of low pressure No AIR_LLL_KR Nil
Failure of both compressors Mandatory AIR_F_KR Nil
Loss of both power supplies Mandatory AIR_PSR_KR Nil
ac power supply Normal available Mandatory Front contact of _NORM LnameNORM
Emergency available Mandatory Front contact of _EMERG LnameEMERG
Load available Mandatory Front contact _PSR LnamePSR
ATS 1 Auto selected No ATS_ON_AUTO Nil
ATS 1 Normal supply available and on line No ATS_NOR Nil
ATS 1 Emergency supply available No ATS_EMERG Nil
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
ATS 1 Essential switchboard one supply available
No ATS_ESS_NOR Nil
UPS healthy (drops out alarm)
with any UPS No UPS_NOR Nil
UPS on bypass No UPS_BYPASS Nil
UPS load on battery No UPS_BATT Nil
UPS ON No UPS_ON Nil
EC01 supply available and on line No EC01_NOR Nil
EC01 bypass supply available No EC01_BYPASS Nil
EC01 essential switchboard 2 supply available
No EC01_ESS_NOR Nil
Signals Signal reverse (RGK) Mandatory Combination of front contact of HR or front contact of LsPR and contact of VRR or front contact of RGKR
• combination of: - SnameT.asp0..asp2 LnameVRR – see train stops indications Rname.set
• logic to perform combination shall be provided by interlocking designer
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Signal normal (NGK) Mandatory Combination of back contact of HR or back contact of LsPR and front contact of VCNR or front contact of NGPR
• combination of: - SnameT.asp0..asp2 LnameVNR – see train stops indications
•
•
latch for train stop suppression where required logic to perform combination shall be provided by interlocking designer
Up direction indicator (_LUYR) No _UYR Nil
Down direction indicator (_DYR) No _DYR Nil
Signal key switch (_GZK) Mandatory _GZK _GZK
Signals Emergency replacement Mandatory Front contact of ENR SnameT.auto
Controlled signal Auto re-clear Mandatory Front contact of (A)SR SnameT.auto *see Note A1
Approach locked (ALS) Mandatory Front contact of ALSR/ALSK in MLK
SnameT.toal
Lever control (_LP) Mandatory Front contact of LPR Either: SnameT.ascon or LnameLPR latch
dc power supply dc power warning Mandatory Front contact of _WARN LnameWARN
dc power fail Mandatory Front contact of _FAIL LnameFAIL
Direction indicator Up direction (UD) Mandatory Front contact of DDKR or DDR LnameDDKR
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Down direction (DD) Mandatory Front contact of DDKR or DDR LnameDDKR
Direction override Timer initiation Mandatory “Section and direction identifier” _PBR
Nil
Direction override Mandatory “Section and direction identifier” SECTION_JR
Nil
Dual controls Control indicator Mandatory Front contact of _CONTROLK Latch
Control repeater Mandatory Front contact of _CONTROLK Latch
Earth leakage detector Earth leakage No Front contact of _ELD LnameELD
Emergency shunt function ESF enabled Mandatory Front contact of ESF_ON LnameESF * See Note A1
Fire system Fire No Front contact of _FIRE_ALARM LnameFIREALARM
Fire system fault No Front contact of _FIRE_FAULT LnameFIREFAULT
Flood detector Alarm No Front contact of _FLOOD_ALARM Nil
Warning No Front contact of _FLOOD_WARNING
Nil
Override No Front contact of _FLOOD_OVERRIDE
Nil
Half pilot staff HPS in lock Mandatory Front contact _HPS LnamHPS
High load detectors Alarm Mandatory Front contact of _ALARM Nil
Health EquipmentOK Mandatory _OK Nil
Level crossing (See Note A3)
Warning Mandatory Front contact of _NO_CHARGE LnameCHARGE
Alarm Mandatory Front contact of _LOW_BATTERY LnameBATTERY
Crossing normal No Front contact of XNR Nil © State of NSW through Transport for NSW Page 19 of 26
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Crossing control No Front contact of XR Nil
Local control Local Mandatory Front contact of LCR Nil
Remote Mandatory Front contact of RCR Nil
Closing Mandatory Front contact of _CLOSING Nil
Override control off Mandatory Front contact of _OVERRIDE_OFF_CONT
Nil
Override control auto Mandatory Front contact of _OVERRIDE_AUTO_CONT
Nil
Override control forced Mandatory Front contact of _OVERRIDE_FORCED_CONT
Nil
Override enabled Mandatory Front contact of OVERRIDE_KR Nil
Mastership Ready Mandatory A_ON_STANDBYK Nil
Master on line Mandatory A_MASTER_ONLINEK Nil
Non-stopping train function Enabled Mandatory Front contact of non-stopping train function
L-NON-STOP-TRAIN
Points Free WZ Mandatory Front contact of WZR LnameWZ
Normal NWK Mandatory Front contact of NWKR Combination of: - Pname.cn and Pname.dn
Reverse RWK Mandatory Front contact of RWKR Combination of: - Pname.cr and Pname.dr
Points maintenance isolating switch
Points maintenance isolating control off Mandatory Front contact of ZIR Nil
Releasing switches Normal detected NK Mandatory Front contact of NKR/NWKR/NR LnameNKR
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Normal locked NL Mandatory Front contact of NLR LnameNLR
Release reverse RL Mandatory Front contact of RLR LnameRLR
Routes Normal lock NL Mandatory Front contact of NLR Rname.set (to be inverted)
Available RUZ Mandatory RUZK Combination of indications.
Ring circuit (See Note A5) Machine in use MUR Mandatory Front contact of MuR Nil
Machine finished FUP Mandatory Front contact of FnPR Nil
Security system Security alarm No Front contact of _SEC_ALARM LnameSECALARM
Security fault No Front contact of _SEC_FAULT LameSECFAULT
Signal filament group Filament failure FCK Mandatory Front contact of FCKR Nil
Signal lamp group Lamp failure ECK Mandatory Front contact of ECR, qualification
with SnameT.lp
Slip (land) detector Slip detected Mandatory Front contact of SLIP NR LnameSLIPNR
Emergency slip override switch Mandatory Front contact of SLIP ALARM R LnameSLIPALARMR
Tracks Unoccupied _T Mandatory Front contact of TKR Combination of: - Tname.clear and Tname.bar
Track timers Expired _J Mandatory Front contract of TJKR LTnameJ
Train stops Normal VN See Note A2 Front contact of VNR LnameVNR
Reverse VR See Note A2 Front contact of VRR LnameVRR
Ventilation lock Enabled See Note A4 Front contact of VCKR Nil
Track sequencing alarm Alarm No Nil LALM(line-location) © State of NSW through Transport for NSW Page 21 of 26
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Treadle Treadle_Fault Mandatory Nil Nil
Miscellaneous (See Note A6)
SSI interlocking critical fault Mandatory Nil Combination of: - nameStatus.newcrit nameStatus.ackcrit nameStatus.timeout nameStatus.disabled
SSI interlocking non-critical fault Mandatory Nil Combination of: - nameStatus.newcrit nameStatus.ackncrit
SSI interlocking disabled Mandatory Nil nameStatus.disabled
Communications OK Mandatory Front contact of Comms_System_OK
Nil
Master on line Mandatory A_MASTER_ONLINEK Nil
Dual link health No THIS_SIDE_OK Nil
OTHER_SIDE_OK
DUAL_LINK_OK
LINK A FOMS M1OK_for each location Mandatory <Location>LINK_A_FOMS_M1OK (for each location / card file)
Nil
LINK B FOMS M1OK_for each location Mandatory <Location>LINK_B_FOMS_M1OK (for each location / card file)
Nil
LINK A FOMS M3OK_for each location Mandatory <Location>LINK_A_FOMS_M3OK (for each location / card file)
Nil
LINK B FOMS M3OK_for each location Mandatory <Location>LINK_B_FOMS_M3OK (for each location / card file)
Nil
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Equipment Indication name
Mandatory requirement for signalling control system
Interface types
Relay / Microlok SSI / Westlock
Cardfile OK (see Note A7) Mandatory <Location> OK (for each location / cardfile)
Nil
This cardfile OK (for dual systems) Mandatory This <Location> OK (or A_OK) (for each location / cardfile)
Nil
Other cardfile OK (for dual systems) Mandatory Other <Location> OK (or B_OK) (for each location / cardfile)
Nil
On line Mandatory A_ONLINE Nil
ON standby Mandatory A_ONSTANDBY (or THIS_MLK_OK_OUT)
Nil
Dual link OK MP1 Mandatory MP1_DUAL_LINK OK Nil
Dual link OK MP2 Mandatory MP2_DUAL_LINK OK Nil
MP1 link <X> OK Mandatory MP1_PORT1LINK OK Nil
MP2 link <X> OK Mandatory MP2_PORT1LINK OK Nil
Microlok warning Mandatory MLK_WARNING Nil
Microlok diversity link in operation Mandatory _DIV_<LOCATION> <LINK> Nil
RS400 / RS416 LOC_A1_RS400_OK No Nil Nil
LOC_A_DAIG_RS416_OK No Nil Nil
Kingfisher Na No Nil Nil
Note A1: Preferred that these functions are performed wholly within the control system.
Note A2: These functions are only for intermediate train stops. Train stops at signals are to be combined with the NGK and RGK functions.
Note A3: Comprehensive level crossing monitoring is performed by the Cerberus systems.
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Note A4: Only included in signalling control system if it impacts signals clearing.
Note A5: Only for existing relay based entrance – exit interlockings with commence and finish functions performed within the relay interlocking.
Note A6: Where Ethernet switches are used, equivalent indications for the device health are to be substituted.
Note A7: Different configurations may require variation to these status bits.
Note A8: <name> indicates the location name.
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Appendix B Controls Table 2 – Controls
Equipment Control name
Interface type
Relay / Microlok SSI / Westlock
Auto re-clear Enable A(F)R See Note B1 See Note B1
Disable Normal A(FM)R or Inverted A(T)R See Note B1
See Note B1
Automatic signals with emergency replacement
Set auto EM_REP or EMRR Nil
Replace Inverted EM(T)REP or Normal EM(FM)REP
Nil
Direction override Set SECTION PB Nil
Dual controls Accept ACPT_RSR Nil
Cancel ACPT_UNR Nil
Emergency shunt function ESF request ESF See Note B1 See Note B1
Entrance exit routes Commence (F)R Nil
Finish (F)R Nil
Cancel (FM)R Nil
High load detectors Test _TEST Nil
Cancel _CANCEL Nil
Mastership Go master CTR_SYS_MASTER See Note B2 Nil
Non-stopping train function Enable NON_STOP_TRAIN_(R)R Nil
Disable NON_STOP_TRAIN_(N)R Nil
One control routes Request RSR pulsed QRname See Note B3
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Equipment Control name
Interface type
Relay / Microlok SSI / Westlock
Cancel UNR pulsed QXSname
Points Centre (C)R steady QPnameKC
Normal (N)R steady QPnameQN
Reverse (R)R steady QPnameQR
Releasing switches Lock (N)R steady Nil
Release (R)R steady Nil
Track sequencing alram Reset Nil QSEQRESET
Note B1: Preferred that these functions are performed wholly within the control system.
Note B2: Not to be used for new work.
Note B3: <name> indicates the location name.
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