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BS EN 61375-2-1:2012

BS EN 61375-2-1:2012

$215.11

Electronic railway equipment. Train communication network (TCN) – Wire Train Bus (WTB)

Published By Publication Date Number of Pages
BSI 2012 390
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This part of IEC 61375 applies to data communication in Open Trains, i.e. it covers data communication between consists of the said open trains and data communication within the consists of the said open trains.

The applicability of this standard to the train communication bus (WTB) allows for interoperability of individual consists within Open Trains in international traffic. The data communication bus inside consists (e.g. MVB) is given as recommended solution to cope with the said TCN. In any case, proof of compatibility between WTB and a proposed consist network will have to be brought by the supplier.

This standard may be additionally applicable to closed trains and multiple unit trains when so agreed between purchaser and supplier.

NOTE 1 For a definition of Open Trains, Multiple Unit Trains and Closed Trains, see Clause 3.

NOTE 2 Road vehicles such as buses and trolley buses are not considered in this standard.

PDF Catalog

PDF Pages PDF Title
8 English
CONTENTS
17 INTRODUCTION
Figures
Figure 1 – Wire Train Bus
18 Figure 2 – Layering of the TCN
19 1 Scope
2 Normative references
20 3 Terms and definitions, abbreviations, conventions
3.1 Terms and definitions
36 3.2 Abbreviations
38 3.3 Conventions
3.3.1 Base of numeric values
3.3.2 Naming conventions
3.3.3 Time naming conventions
39 3.3.4 Procedural interface conventions
40 Tables
Table 1 – Template for the specification of an interface procedure
41 3.3.5 Specification of transmitted data
Table 2 – Example of message structure
42 Table 3 – Example of textual message form (corresponding to Table 2)
43 3.3.6 State diagram conventions
Figure 3 – State transition example
Table 4 – State transitions table
44 3.4 General considerations
3.4.1 Interface between equipment
3.4.2 Interface between consists
3.4.3 Real-Time Protocols
Figure 4 – Interfaces between equipment
Figure 5 – Interfaces between consists
45 3.4.4 Network Management
3.4.5 Configurations
Figure 6 – Train Bus and Consist network
46 3.4.6 Structure of a standard device
Figure 7 – TCN configurations
47 Figure 8 – TCN WTB device configuration options
49 3.5 Conformance test
Table 5 – Interoperability testing
50 4 Physical layer
4.1 Topology
4.1.1 Bus sections
4.1.2 Couplers
4.1.3 Nodes
4.1.4 Consist orientation
Figure 9 – Train Composition (two Intermediate Nodes shown)
51 4.1.5 Consist specification (informal)
Figure 10 – Vehicle measurement
52 4.2 Medium specifications
4.2.1 Topology
4.2.2 Duplicated medium (option)
Figure 11 – Connected nodes in regular operation
53 4.2.3 Bus Configuration rules
Figure 12 – Double-line attachment
54 4.2.4 Cable specification
55 4.2.5 Shielding concept
56 4.2.6 Terminator
Figure 13 – Grounded shield concept
Figure 14 – Floating shield concept
57 4.3 Medium attachment
4.3.1 Node connection points identification
4.3.2 Direct node attachment
Figure 15 – Terminator
Figure 16 – Direct node attachment (optional double-line)
58 4.3.3 Indirect node attachment
4.3.4 Connector (optional)
Figure 17 – Indirect attachment
59 4.4 Node specifications
4.4.1 Node elements
Figure 18 – WTB connector, front view
Table 6 – WTB connector pin assignment
60 Figure 19 – Example of MAU Structure
61 4.4.2 Node and switch settings
4.4.3 Duplicated Line Units (option)
62 4.5 Line Unit specifications
4.5.1 Galvanic separation
4.5.2 Insertion losses of a Line Unit
Figure 20 – Node with redundant Line Units
63 4.5.3 Switches specifications
4.5.4 Shield connection to a Line Unit
Figure 21 – Attenuation measurement
64 4.5.5 Fritting (option)
Figure 22 – Shield grounding in the Line Unit
Figure 23 – Fritting source and load
65 4.6 Transceiver specifications
4.6.1 Conventions
4.6.2 Transmitter
66 Figure 24 – Transmitter fixtures
67 Figure 25 – Pulse wave form at transmitter
68 4.6.3 Receiver specifications
Figure 26 – Signal and idling at transmitter
69 Figure 27 – Receiver signal envelope
70 4.7 Medium-dependent signalling
4.7.1 Frame encoding and decoding
Figure 28 – Receiver edge distortion
71 Figure 29 – Idealised frame on the line (16 bit Preamble shown)
Figure 30 – Bit encoding
Figure 31 – Preamble
72 Figure 32 – End Delimiter
73 4.7.2 Duplicated line handling (option)
Figure 33 – Valid frame, RxS, CS and SQE signals
Figure 34 – Garbled frame, RxS, CS, SQE signals
74 Figure 35 – Redundant Lines (as seen at a receiver)
75 4.7.3 Line Unit interface
Figure 36 – Line_Disturbance signals
76 5 Link Layer Control
5.1 Addressing
Table 7 – Signals of the Line Unit Interface
77 5.2 Frames and telegrams
5.2.1 Frame_Data format
Figure 37 – HDLC Frame structure
78 5.2.2 Telegram timing
Figure 38 – Telegram timing
79 Figure 39 – Example of Interframe spacing
80 5.2.3 Elements of the HDLC Frame
Figure 40 – Frame spacing measured at the master side
Figure 41 – Frame spacing at the slave
81 5.2.4 Link Control Field
Figure 42 – HDLC Data format
Figure 43 – Format of HDLC Data
82 Table 8 – Link Control encoding
84 5.2.5 Handling of ‘Attention’, ‘Change’ and ‘Inhibit’
5.2.6 Size, FCS and protocol errors
5.3 Telegram formats and protocols
5.3.1 Link Data field
85 5.3.2 Process Data
Figure 44 – Process Data telegram
86 Figure 45 – Format of Process Data Request
87 5.3.3 Message Data
Figure 46 – Format of Process Data Response
Figure 47 – Message Data telegram
Figure 48 – Format of Message Data Request
88 5.3.4 Supervisory Data
Figure 49 – Format of Message Data Response
Figure 50 – Supervisory telegram
89 5.3.5 Detection telegram
Figure 51 – Detection telegram
90 Figure 52 – Format of Detect Request
Figure 53 – Format of Detect Response
91 5.3.6 Presence telegram
Figure 54 – Presence telegram
Figure 55 – Format of Presence Request
92 5.3.7 Status telegram
Figure 56 – Format of Presence Response
Figure 57 – Status telegram
93 Figure 58 – Format of Status Request
94 5.3.8 Set to Intermediate telegram
Figure 59 – Format of Status Response
Figure 60 – Set-to-Intermediate telegram
Figure 61 – Format of SetInt Request
95 5.3.9 Naming telegram
Figure 62 – Format of SetInt Response
Figure 63 – Naming telegram
96 Figure 64 – Format of Naming Request
Figure 65 – Format of Naming Response
97 5.3.10 Unname telegram
5.3.11 Set to End telegram
Figure 66 – Unnaming telegram
Figure 67 – Format of Unname Request
Figure 68 – Set to End telegram
98 Figure 69 – Format of SetEnd Request
Figure 70 – Format of SetEnd Response
99 5.3.12 Topography telegram
Figure 71 – Topography telegram
Figure 72 – Format of Topography Request
100 Figure 73 – Format of Topography Response
101 5.4 Medium allocation
5.4.1 Organisation
Figure 74 – Structure of the Basic Period
102 5.4.2 Periodic Phase
103 5.4.3 Sporadic phase
5.5 Inauguration
5.5.1 General
104 Figure 75 – Node position numbering
105 5.5.2 Descriptors
Figure 76 – Format of Node Descriptor
106 Figure 77 – Format of Node Report
Figure 78 – Format of User Report
107 Figure 79 – Format of Composition Strength
108 Figure 80 – Master_Report
Figure 81 – Format of Topo Counter
109 5.5.3 Detection of other compositions (informal)
Figure 82 – Format of Master Topo
111 Figure 83 – Timing Diagram of detection protocol
112 5.5.4 State diagrams of the inauguration
Figure 84 – Major node states and application settings
113 Figure 85 – Node processes (End Setting)
114 Table 9 – NodeControl data structure
115 Table 10 – MyStatus data structure
116 Table 11 – Shared Variables of a node
Table 12 – Variables of Main Process
117 Table 13 – Lists of Main Process
119 Figure 86 – AUXILIARY_PROCESS states
120 Figure 87 – NAMING_RESPONSE macro
121 Figure 88 – States of MAIN PROCESS
122 Table 14 – ‘START_NODE’
Table 15 – ‘MASTER STATES’
123 Table 16 – ‘SLAVE STATES’
124 Figure 89 – Macro ‘START_NODE’
126 Figure 90 – Procedure REQUEST_RESPONSE
127 Figure 91 – Procedures ‘SET_TO_INT’ and ‘SET_TO_END’
128 Figure 92 – Macro ‘INIT_MASTER’
129 Figure 93 – Macro ‘NAMING_MASTER’
130 Figure 94 – Macro ASK_END
133 Figure 95 – Procedure NAME_ONE
135 Figure 96 – Macro TEACHING_MASTER
136 Figure 97 – Macro ‘UNNAMING_MASTER’
138 Figure 98 – Macro ‘REGULAR_MASTER’
139 Figure 99 – Macro CHECK_DESC
141 Figure 100 – Macro PERIODIC_POLL
142 Figure 101 – Macro MESSAGE_POLL
144 Figure 102 – States ‘UNNAMED_SLAVE’
146 Figure 103 – States ‘NAMED_SLAVE’
148 Figure 104 – Macro ‘LEARNING_SLAVE’
150 Figure 105 – Macro ‘REGULAR_SLAVE’
151 Table 17 – Time constant values
152 5.6 Link layer interface
5.6.1 Link layer layering
Figure 106 – Link layer layering
153 5.6.2 Link Process_Data_Interface
154 5.6.3 Link Message_Data_Interface
5.6.4 Link management interface
165 6 Real-Time protocols
6.1 General
6.1.1 Contents of this clause
Figure 107 – Structure of the Train Communication Network
166 6.1.2 Structure of this clause
Figure 108 – Real-Time Protocols layering
167 6.2 Variables – Services and Protocols
6.2.1 General
6.2.2 Link layer Interface for Process_Data
170 Figure 109 – LPI primitives exchange
Table 18 – LPI primitives
173 6.2.3 Application interface for Process_Variables
175 Figure 110 – Check_Variable
177 Table 19 – Var_Size and Var_Type encoding in a PV_Name
179 Figure 111 – Individual access
183 Figure 112 – Set access
186 Figure 113 – Cluster access
188 6.3 Messages Services and Protocols
6.3.1 General
6.3.2 Reference station
Figure 114 – Terminal station
189 Figure 115 – Router station between WTB and MVB
190 Figure 116 – Gateway station between WTB and Consist network
191 6.3.3 Message packets handling
192 Figure 117 – Packet format
193 6.3.4 Message Link layer
194 Figure 118 – Link layer data transmission
195 Figure 119 – Link_Message_Data_Interface (LMI)
196 Figure 120 – Example of MVB Message_Data frame
197 Figure 121 – Example of WTB Message_Data frame
198 Figure 122 – LMI primitives
199 Table 20 – LMI primitives
203 6.3.5 Message Network Layer
204 Figure 123 – Network layer on a Node
207 Figure 124 – Encoding of the Network_Address
209 Figure 125 – Building of the addresses in an outbound packet
210 Figure 126 – Network address encoding on the train bus
211 Table 21 – Routing situations
213 Table 22 – Routing of packets coming from the transport layer
214 Table 23 – Routing of packets coming from a consist network
215 6.3.6 Message transport layer
Table 24 – Routing of packets coming from the train bus
217 Figure 127 – Transport packet exchange
219 Figure 128 – Packet formats (transport layer body)
220 Table 25 – Message Transport Control encoding
223 Table 26 – Connect_Request
Table 27 – Connect_Confirm
224 Table 28 – Disconnect_Request
Table 29 – Disconnect_Confirm
Table 30 – Data_Packet
225 Table 31 – Ack_Packet
Table 32 – Nak_Packet
Table 33 – Broadcast_Connect (BC1, BC2, BC3)
226 Table 34 – Broadcast_Data
Table 35 – Broadcast_Repeat
227 Table 36 – Broadcast_Stop (BSC, BSO)
Table 37 – MTP states
228 Figure 129 – State transition diagram of the MTP
229 Table 38 – MTP incoming events
Table 39 – MTP outgoing events
230 Table 40 – MTP control parameters
Table 41 – MTP auxiliary variables
231 Figure 130 – Time-out SEND_TMO
232 Figure 131 – Time-out ALIVE_TMO
Table 42 – MTP time-outs (worst case)
Table 43 – Implicit actions
233 Table 44 – Compound actions
234 Table 45 – Producer states and transitions
237 Table 46 – Consumer states and transitions
240 Figure 132 – Transport interface
241 Table 47 – TMI primitives
246 6.3.7 Multicast Transport Protocol (option)
247 Figure 133 – Multicast message with no retransmission
248 Figure 134 – Short multicast message with no BD packets and no loss
249 Figure 135 – Exchange with lost packets
251 Figure 136 – Packet formats
252 Figure 137 – Protocol machine states
Table 48 – States of the MCP machine
253 Table 49 – Incoming Events
Table 50 – Outgoing Events
254 Table 51 – Control fields in packets
255 Table 52 – Auxiliary variables
256 Table 53 – MCP constants
Table 54 – MCP time-outs
257 Table 55 – MCP Compound actions
258 Table 56 – Filtering of BR packets
259 Table 57 – MCP Producer state event table
261 Table 58 – MCP Consumer state event table
262 6.3.8 Message session layer
263 Figure 138 – Session layer transfer
264 6.3.9 Message Presentation Layer
6.3.10 Message Application layer
Figure 139 – Session_Header in Call_Message (of type Am_Result)
265 Figure 140 – Application_Messages_Interface
266 Table 59 – AMI primitives
268 Table 60 – Address constants
269 Figure 141 – Encoding of AM_ADDRESS
271 Table 61 – System Address and User Address
285 6.4 Presentation and encoding of transmitted and stored data
6.4.1 Purpose
286 6.4.2 Data ordering
287 6.4.3 Notation for the primitive types
294 6.4.4 Structured types
303 6.4.5 Alignment
6.4.6 Notation for special types
305 7 Application Layer
7.1 Process Data Marshalling
7.1.1 Marshalling Types
7.1.2 Marshalling Modes
Figure 142 – Process Data Marshalling
306 7.1.3 Data Paths in PDM
Figure 143 – PDM Data Paths
307 7.1.4 PDM Operation
308 7.1.5 PDM Functions
Figure 144 – PDM Operation
Figure 145 – PDM Invalidate Variable or Function result
310 7.2 WTB Line Fault Location Detection
Figure 146 – PDM Operation
Figure 147 – PDM Validty check
311 7.2.1 Architecture
Figure 148 – LFLD Architecture
312 7.2.2 Protocol Overview
313 7.2.3 LFLD Sequence
Figure 149 – LFLD sequence
315 7.2.4 End Node State Machine (Testing Node)
7.2.5 Intermediate Node State Machine (Segmenting Node)
7.2.6 Disturbed Line selection
7.2.7 Location Detection
Figure 150 – End node state machine
316 Figure 151 – LFLD process, SN at node 63
Figure 152 – LFLD process, SN at node 1
317 8 Train Network Management
8.1 General
8.1.1 Contents of this clause
Figure 153 – LFLD process, SN at node 1, attachment in direction 1
318 8.1.2 Structure of this clause
8.2 Manager, Agents and interfaces
8.2.1 Manager and Agent
8.2.2 Management messages protocol
319 8.2.3 Interfaces
Figure 154 – Management messages
320 Figure 155 – Agent Interface on a (gateway) Station
321 8.3 Managed objects
8.3.1 Object Attributes
8.3.2 Station objects
322 Figure 156 – Station_Status
324 8.3.3 WTB link objects
325 8.3.4 Variable objects
327 8.3.5 Messenger objects
328 8.3.6 Domain objects
8.3.7 Task objects
329 8.3.8 Clock object
8.3.9 Journal object
330 8.3.10 Equipment object
8.4 Services and management messages
8.4.1 Notation for all management messages
335 8.4.2 Station services
342 8.4.3 WTB link services
354 8.4.4 Variables services
364 8.4.5 Messages services
373 8.4.6 Domain services
378 8.4.7 Task services
380 8.4.8 Clock services
381 8.4.9 Journal Service
383 8.4.10 Equipment Service
384 8.5 Interface Procedures
8.5.1 Manager interface (MGI)
385 8.5.2 Agent interface
388 Bibliography

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BS EN 61375-2-1:2012
$215.11