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BS EN IEC 61158-4-2:2023

BS EN IEC 61158-4-2:2023

$215.11

Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 2 elements

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BSI 2023 408
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IEC 61158-4-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the “three-layer” fieldbus reference model described in IEC 61158‑1. The data-link protocol provides the data-link service by making use of the services available from the physical layer. The primary aim of this document is to provide a set of rules for communication expressed in terms of the procedures to be carried out by peer data-link entities (DLEs) at the time of communication. These rules for communication are intended to provide a sound basis for development in order to serve a variety of purposes: – as a guide for implementers and designers; – for use in the testing and procurement of equipment; – as part of an agreement for the admittance of systems into the open systems environment; – as a refinement to the understanding of time-critical communications within OSI.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
8 Blank Page
9 CONTENTS
23 FOREWORD
25 INTRODUCTION
26 1 Scope
1.1 General
1.2 Specifications
1.3 Procedures
27 1.4 Applicability
1.5 Conformance
2 Normative references
29 3 Terms, definitions, symbols, abbreviated terms and conventions
3.1 Reference model terms and definitions
31 3.2 Service convention terms and definitions
3.3 Common terms and definitions
32 3.4 Additional Type 2 definitions
40 3.5 Type 2 symbols and abbreviated terms
41 3.6 Conventions for station management objects
Tables
Table 1 – Format of attribute tables
42 4 Overview of the data-link protocol
4.1 General
4.1.1 DLL architecture
43 Figures
Figure 1 – Data-link layer internal architecture
Table 2 – Data-link layer components
44 4.1.2 Access control machine (ACM) and scheduling support functions
4.1.3 Connection-mode, connectionless-mode data transfer and DL service
4.2 Services provided by the DL
4.2.1 Overview
45 4.2.2 QoS
4.3 Structure and definition of DLaddresses
4.3.1 General
46 4.3.2 MAC ID address
Figure 2 – Relationships of DLSAPs, DLSAPaddresses, and group DLaddresses
Figure 3 – Basic structure of a MAC ID address
47 4.3.3 Generic tag address
4.3.4 Fixed tag address
Figure 4 – Basic structure of a generic tag address
Figure 5 – Basic structure of a fixed tag address
Table 3 – MAC ID addresses allocation
Table 4 – Fixed tag service definitions
48 4.4 Services assumed from the PhL
4.4.1 General requirements
4.4.2 Data encoding rules
49 4.4.3 DLL to PhL interface
Figure 6 – M_symbols and Manchester encoding at 5 MHz
Table 5 – Data encoding rules
50 Table 6 – M Data symbols
Table 7 – Truth table for ph_status_indication
51 4.5 Functional classes
5 General structure and encoding of PhIDUs and DLPDUs and related elements of procedure
5.1 Overview
5.2 Media access procedure
52 Figure 7 – NUT structure
53 Figure 8 – Media access during scheduled time
54 Figure 9 – Media access during unscheduled time
55 5.3 DLPDU structure and encoding
5.3.1 General
5.3.2 DLPDU components
5.3.3 Preamble
5.3.4 Start and end delimiters
5.3.5 DLPDU octets and ordering
Figure 10 – DLPDU format
56 5.3.6 Source MAC ID
5.3.7 Lpackets field
5.3.8 Frame check sequence (FCS)
Table 8 – FCS length, polynomials and constants
59 5.3.9 Null DLPDU
5.3.10 Abort DLPDU
5.4 Lpacket components
5.4.1 General Lpacket structure
Figure 11 – Aborting a DLPDU during transmission
60 5.4.2 Size
5.4.3 Control
5.4.4 Generic tag Lpackets
Figure 12 – Lpacket format
61 5.4.5 Fixed tag Lpackets
5.5 DLPDU procedures
5.5.1 General
Figure 13 – Generic tag Lpacket format
Figure 14 – Fixed tag Lpacket format
62 5.5.2 Sending scheduled DLPDUs
5.5.3 Sending unscheduled DLPDUs
5.5.4 Receiving DLPDUs
63 5.6 Summary of DLL support services and objects
Table 9 – DLL support services and objects
64 6 Specific DLPDU structure, encoding and procedures
6.1 Modeling language
6.1.1 State machine description
65 6.1.2 Use of DLL- prefix
6.1.3 Data types
66 6.2 DLS user services
6.2.1 General
Table 10 – Elementary data types
67 6.2.2 Connected mode and connectionless mode transfer service
68 6.2.3 Queue maintenance service
6.2.4 Tag filter service
69 6.2.5 Link synchronization service
6.2.6 Synchronized parameter change service
70 6.2.7 Event reports service
Table 11 – DLL events
71 6.2.8 Bad FCS service
6.2.9 Current moderator service
6.2.10 Power up and online services
72 6.2.11 Enable moderator service
6.2.12 Listen only service
6.3 Generic tag Lpacket
6.3.1 General
6.3.2 Structure of the generic-tag Lpacket
73 6.3.3 Sending and receiving the generic-tag Lpacket
6.4 Moderator Lpacket
6.4.1 General
6.4.2 Structure of the moderator Lpacket
6.4.3 Sending and receiving the moderator Lpacket
74 6.5 Time distribution Lpacket
6.5.1 General
6.5.2 Structure of the time distribution Lpacket
75 Figure 15 – Goodness parameter of TimeDist_Lpacket
76 6.5.3 Sending and receiving the time distribution Lpacket
Table 12 – Time distribution priority
77 6.6 UCMM Lpacket
6.6.1 General
6.6.2 Structure of the UCMM Lpacket
6.6.3 Sending and receiving the UCMM Lpacket
6.7 Keeper UCMM Lpacket
6.7.1 General
6.7.2 Structure of the Keeper UCMM Lpacket
6.7.3 Sending and receiving the Keeper UCMM Lpacket
78 6.8 TUI Lpacket
6.8.1 General
6.8.2 Structure of the TUI Lpacket
Table 13 – Format of the TUI Lpacket
79 6.8.3 Sending and receiving the TUI Lpacket
6.9 Link parameters Lpacket and tMinus Lpacket
6.9.1 General
6.9.2 Structure of link parameters and tMinus Lpackets
80 6.9.3 Sending and receiving the tMinus and Link parameters Lpackets
6.10 I’m-alive Lpacket
6.10.1 General
6.10.2 Structure or the I’m-alive Lpacket
81 6.10.3 Sending and receiving I’m Alive
6.10.4 I’m alive state processing
82 6.11 Ping Lpackets
6.11.1 General
Figure 16 – Example I’m alive processing algorithm
83 6.11.2 Structure of the ping Lpackets
6.11.3 Sending and receiving the ping Lpackets
6.12 WAMI Lpacket
6.12.1 General
84 6.12.2 Structure of the WAMI Lpacket
6.12.3 Sending and receiving the WAMI Lpacket
6.13 Debug Lpacket
85 6.14 IP Lpacket
6.15 Ethernet Lpacket
7 Objects for station management
7.1 General
87 7.2 ControlNet™ object
7.2.1 Overview
7.2.2 Class attributes
7.2.3 Instance attributes
Table 14 – ControlNet object class attributes
88 Table 15 – ControlNet object instance attributes
93 Table 16 – TUI status flag bits
94 Table 17 – Mac_ver bits
Table 18 – Channel state bits
96 7.2.4 Common services
Table 19 – ControlNet object common services
97 7.2.5 Class specific services
Table 20 – ControlNet object class specific services
98 7.2.6 Behavior
7.2.7 Module status indicator
99 7.3 Keeper object
7.3.1 Overview
7.3.2 Revision history
7.3.3 Class attributes
7.3.4 Instance attributes
Table 21 – Keeper object revision history
Table 22 – Keeper object class attributes
100 Table 23 – Keeper object instance attributes
104 Table 24 – Keeper operating state definitions
Table 25 – Port status flag bit definitions
105 Table 26 – TUI status flag bits
106 Figure 17 – Keeper CRC algorithm
108 7.3.5 Common services
Table 27 – Keeper attributes
Table 28 – Memory requirements (in octets) for the Keeper attributes
109 7.3.6 Class specific services
Table 29 – Keeper object common services
Table 30 – Keeper object class specific services
110 Table 31 – Service error codes
114 Table 32 – Wire order format of the TUI Lpacket
115 7.3.7 Service error codes
7.3.8 Behavior
Table 33 – Service error codes
116 7.3.9 Miscellaneous notes
Table 34 – Keeper object operating states
117 7.3.10 Keeper power up sequence
118 Figure 18 – Keeper object power-up state diagram
119 Figure 19 – Keeper object operating state diagram
120 Table 35 – Keeper object state event matrix
122 7.4 Scheduling object
7.4.1 Overview
Figure 20 – Synchronized network change processing
123 7.4.2 Class attributes
7.4.3 Instance attributes
Table 36 – Scheduling object class attributes
124 7.4.4 Common services
Table 37 – Scheduling object instance attributes
Table 38 – Scheduling object common services
125 Table 39 – Status error descriptions for Create
126 7.4.5 Class specific services
Table 40 – Status error descriptions for Delete and Kick_Timer
Table 41 – Scheduling object class specific services
128 Table 42 – Status error descriptions for Read
129 Table 43 – Status error descriptions for Conditional_Write
Table 44 – Status error descriptions for Forced_Write
130 Table 45 – Status error descriptions for Change_Start
131 Table 46 – Status error descriptions for Break_Connections
Table 47 – Status error descriptions for Change_Complete
132 7.4.6 Typical scheduling session
Table 48 – Status error descriptions for Restart_Connections
133 7.5 TCP/IP Interface object
7.5.1 Overview
7.5.2 Revision history
7.5.3 Class attributes
Table 49 – Revision history
134 7.5.4 Instance attributes
Table 50 – TCP/IP Interface object class attributes
Table 51 – TCP/IP Interface object instance attributes
139 Table 52 – Status bits
140 Table 53 – Configuration capability bits
141 Table 54 – Configuration control bits
142 Table 55 – Example path
143 Table 56 – Interface configuration components
145 Table 57 – Alloc control values
146 Table 58 – AcdActivity values
Table 59 – ArpPdu – ARP Response PDU in binary format
147 Table 60 – Admin Capability member bit definitions
148 Table 61 – Admin Capability member bit definitions
149 7.5.5 Diagnostic connection points
7.5.6 Common services
Table 62 – TCP/IP Interface connection point 1, Standard Network Diagnostics
150 Table 63 – TCP/IP Interface object common services
151 Table 64 – Get_Attributes_All response format
152 7.5.7 Class specific services
Table 65 – Set_Attributes_All request format
Table 66 – TCP/IP Interface object class specific services
153 Table 67 – Set_Port_Admin_State service request parameters
Table 68 – Set_Protocol_Admin_State service request parameters
154 7.5.8 Behavior
Figure 21 – State transition diagram for TCP/IP Interface object
Table 69 – Class specific error codes
155 7.5.9 Address Conflict Detection (ACD)
Figure 22 – State transition diagram for TCP/IP Interface object
157 Figure 23 – ACD Behavior
161 7.6 Ethernet Link object
7.6.1 Overview
7.6.2 Revision history
7.6.3 Class attributes
Table 70 – Ethernet link object revision history
162 7.6.4 Instance attributes
Table 71 – Ethernet link object class attributes
Table 72 – Ethernet link object instance attributes
167 Table 73 – Interface flags bits
169 Table 74 – Control bits
170 Table 75 – Interface type
Table 76 – Interface state
Table 77 – Admin state
171 Table 78 – Capability Bits
172 7.6.5 Diagnostic connection points
Table 79 – Ethernet Link connection point 1, Standard Network Diagnostics
173 7.6.6 Common services
Table 80 – Ethernet Link object common services
174 7.6.7 Class specific services
Table 81 – Get_Attributes_All response format
175 7.6.8 Behavior
Table 82 – Ethernet Link object class specific services
176 7.7 DeviceNet™ object
7.7.1 Overview
Figure 24 – State transition diagram for Ethernet Link object
177 7.7.2 Revision history
7.7.3 Class attributes
7.7.4 Instance attributes
Table 83 – DeviceNet object revision history
Table 84 – DeviceNet object class attributes
Table 85 – DeviceNet object instance attributes
180 Table 86 – Bit rate attribute values
Table 87 – BOI attribute values
183 Table 88 – Diagnostic counters bit description
184 7.7.5 Common services
Table 89 – DeviceNet object common services
Table 90 – Reset service parameter
Table 91 – Reset service parameter values
185 7.7.6 Class specific services
Table 92 – DeviceNet object class specific services
186 7.8 Connection Configuration object (CCO)
7.8.1 Overview
7.8.2 Revision history
7.8.3 Class attributes
Table 93 – Connection Configuration object revision history
Table 94 – Connection Configuration object class attributes
188 7.8.4 Instance attributes
Table 95 – Format number values
Table 96 – Connection Configuration object instance attributes
192 Table 97 – Originator connection status values
Table 98 – Target connection status values
193 Table 99 – Connection flags
195 Table 100 – I/O mapping formats
197 7.8.5 Connection Configuration object change control
7.8.6 Common services
Table 101 – Services valid during a change operation
Table 102 – Connection Configuration object common services
198 Table 103 – Get_Attributes_All Response – class level
Table 104 – Get_Attributes_All response – instance level
200 Table 105 – Set_Attributes_All error codes
Table 106 – Set_Attributes_All request
202 Table 107 – Create request parameters
Table 108 – Create error codes
Table 109 – Delete error codes
203 7.8.7 Class specific services
Table 110 – Restore error codes
Table 111 – Connection Configuration object class specific services
204 Table 112 – Change_Start error codes
205 Table 113 – Get_Status service parameter
Table 114 – Get_Status service response
Table 115 – Get_Status service error codes
206 Table 116 – Change_Complete service parameter
Table 117 – Change_Complete service error codes
Table 118 – Audit_Changes service parameter
Table 119 – Audit_Changes service error codes
207 7.8.8 Behavior
7.9 DLR object
7.9.1 Overview
Figure 25 – Connection Configuration object edit flowchart
208 7.9.2 Revision history
7.9.3 Class attributes
7.9.4 Instance attributes
Table 120 – Revision history
Table 121 – DLR object class attributes
209 Table 122 – DLR object instance attributes
213 Table 123 – Network Status values
Table 124 – Ring Supervisor Status values
217 Table 125 – Capability flags
219 Table 126 – Redundant Gateway Status values
220 7.9.5 Diagnostic connection points
7.9.6 Common services
Table 127 – DLR connection point 1, Standard Network Diagnostics
Table 128 – DLR connection point 2, Standard Network Diagnostics
221 Table 129 – DLR object common services
Table 130 – Get_Attributes_All Response – Object Revision 1, non supervisor device
222 Table 131 – Get_Attributes_All Response – Object Revision 1, supervisor-capable device
Table 132 – Get_Attributes_All Response – Object Revision 2, non supervisor device
223 Table 133 – Get_Attributes_All Response – All other cases
224 7.9.7 Class specific services
Table 134 – DLR object class specific services
225 7.10 QoS object
7.10.1 Overview
7.10.2 Revision History
7.10.3 Class attributes
Table 135 – QoS object revision history
226 7.10.4 Instance Attributes
Table 136 – QoS object class attributes
Table 137 – QoS object instance attributes
227 7.10.5 Common services
Table 138 – Default DCSP values and usages
228 7.11 Port object
7.11.1 Overview
7.11.2 Revision History
Table 139 – QoS object common services
229 7.11.3 Class attributes
7.11.4 Instance attributes
Table 140 – Port object revision history
Table 141 – Port object class attributes
230 Table 142 – Port object instance attributes
232 Table 143 – Port Type and associated Logical Link Object classes and Port Type Name values
235 Table 144 – Port Routing Capabilities attribute bit definitions
236 7.11.5 Common services
Figure 26 – Communication objects diagram for example device
Table 145 – Contents of Associated Communication objects attribute 11 for the two Port object instances of the example device
237 Table 146 – Port object common services
Table 147 – Get_Attributes_All response– class level
Table 148 – Get_Attributes_All response– instance level
238 7.12 PRP/HSR Protocol object
7.12.1 Overview
7.12.2 Revision history
7.12.3 Class attributes
7.12.4 Instance attributes
Table 149 – Revision history
Table 150 – Class attributes
239 Table 151 – Instance attributes
242 Table 152 – Node Type
243 Table 153 – Switching Node
244 Table 154 – HSR Mode
245 Table 155 – RedBox ID
246 7.12.5 Diagnostic connection points
7.12.6 Common Services
Table 156 – PRP/HSR Protocol connection point 1, Standard Network Diagnostics
247 Table 157 – PRP/HSR Protocol object common services
Table 158 – Get_Attributes_All response
248 7.13 PRP/HSR Nodes Table object
7.13.1 Overview
7.13.2 Revision history
249 7.13.3 Class attributes
7.13.4 Instance attributes
Table 159 – Revision history
Table 160 – Class attributes
Table 161 – Instance attributes
251 7.13.5 Common services
Table 162 – Remote Node Type
252 7.14 LLDP Management object
7.14.1 Overview
7.14.2 Revision history
Table 163 – PRP/HSR Nodes Tables object common services
Table 164 – Get_Attributes_All response
Table 165 – Revision history
253 7.14.3 Class attributes
7.14.4 Instance attributes
Table 166 – Class attributes
Table 167 – Instance attributes
254 7.14.5 Common services
Table 168 – Bit Definitions of the LLDP Enable Array
255 7.15 LLDP Data Table object
7.15.1 Overview
Table 169 – LLDP Management object common services
Table 170 – Get_Attributes_All response
256 7.15.2 Revision history
7.15.3 Class attributes
7.15.4 Instance attributes
Table 171 – Revision history
Table 172 – Class attributes
Table 173 – Instance attributes
260 7.15.5 Common services
Table 174 – Bitmaps of supported capabilities & enabled capabilities
Table 175 – LLDP Management object common services
261 8 Other DLE elements of procedure
8.1 Network attachment monitor (NAM)
8.1.1 General
Table 176 – Get_Attributes_All response
262 Table 177 – NAM states
263 8.1.2 Default parameters
8.1.3 Auto-addressing
Figure 27 – NAM state machine
Table 178 – Default link parameters
264 8.1.4 Valid MAC IDs
8.1.5 State machine description
270 8.2 Calculating link parameters
8.2.1 Link parameters
8.2.2 Conditions affecting link parameters
8.2.3 Moderator change
271 8.2.4 NUT timing
Table 179 – PhL timing characteristics
272 8.2.5 Slot timing
273 8.2.6 Blanking
8.2.7 Example implementation
278 9 Detailed specification of DL components
9.1 General
9.2 Access control machine (ACM)
297 9.3 TxLLC
302 9.4 RxLLC
305 9.5 Transmit machine (TxM)
309 9.6 Receive machine (RxM)
315 9.7 Serializer
317 9.8 Deserializer
9.8.1 Octet construction
318 9.8.2 FCS checking
9.8.3 End of DLPDU processing
9.9 DLL management
320 10 Device Level Ring (DLR) protocol
10.1 General
321 10.2 Support for Multiple DLR Ring Pairs
Figure 28 – Devices with Multiple DLR Ring Pairs
322 10.3 Supported topologies
Figure 29 – DLR rings connected to switches
323 10.4 Overview of DLR operation
10.4.1 Normal operation
Figure 30 – Normal operation of a DLR network
Figure 31 – Beacon and Announce frames
324 10.4.2 Link failures
Figure 32 – Link failure
325 10.5 Classes of DLR implementation
Figure 33 – Network reconfiguration after link failure
326 10.6 DLR behavior
10.6.1 DLR variables
10.6.2 Ring supervisor
Table 180 – DLR variables
329 10.6.3 Ring node
330 10.6.4 Sign on process
331 10.6.5 Neighbor check process
10.7 Implementation requirements
10.7.1 Embedded switch requirements and recommendations
Figure 34 – Neighbor Check process
332 10.7.2 DLR implementation requirements
Table 181 – DLR Link speed and duplex requirements
333 10.7.3 IEC 61588 and Type 2 Ethernet considerations
10.7.4 IEEE Std 802.1Q-2018 STP/RSTP/MSTP considerations
10.8 Using non-DLR nodes in the ring network
10.8.1 General considerations
334 10.8.2 Non-DLR end devices
10.8.3 Non-DLR switches
335 Figure 35 – Unsupported topology – example 1
Figure 36 – Unsupported topology – example 2
336 10.9 Redundant gateway devices on DLR network
10.9.1 General
337 10.9.2 Supported topologies
10.9.3 Redundant gateway capable device
Figure 37 – DLR ring connected to switches through redundant gateways
338 10.9.4 Redundant gateway device behavior
Figure 38 – DLR redundant gateway capable device
339 Table 182 – Redundant gateway variables
340 Figure 39 – Advertise frame
341 10.10 DLR messages
10.10.1 General
342 10.10.2 Common frame header
Table 183 – MAC addresses for DLR messages
Table 184 – IEEE Std 802.1Q-2018 common frame header format
Table 185 –DLR message payload fields
343 10.10.3 Beacon frame
10.10.4 Neighbor_Check request
Table 186 – DLR frame types
Table 187 – Format of the Beacon frame
Table 188 – Ring State values
344 10.10.5 Neighbor_Check_response
10.10.6 Link_Status/Neighbor_Status
Table 189 – Format of the Neighbor_Check request
Table 190 – Format of the Neighbor_Check response
Table 191 – Format of the Link_Status/Neighbor_Status frame
345 10.10.7 Locate_Fault
10.10.8 Announce
10.10.9 Sign_On
Table 192 – Link/Neighbor status values
Table 193 – Format of the Locate_Fault frame
Table 194 – Format of the Announce frame
346 10.10.10  Advertise
10.10.11  Flush_Tables
Table 195 – Format of the Sign_On frame
Table 196 – Format of the Advertise frame
Table 197 – Gateway state values
347 10.10.12  Learning_Update
10.11 State diagrams and state-event-action matrices
10.11.1 Beacon-based ring node
Table 198 – Format of the Flush_Tables frame
Table 199 – Format of the Learning_Update frame
348 Figure 40 – State transition diagram for Beacon frame based non-supervisor ring node
Table 200 – Parameter values for Beacon frame based non-supervisor ring node
349 Table 201 – LastBcnRcvPort bit definitions
Table 202 – State-event-action matrix for Beacon frame based non-supervisor ring node
354 10.11.2 Announce-based ring node
Figure 41 – State transition diagram for Announce frame basednon-supervisor ring node
355 Table 203 – Parameter values for Announce frame based non-supervisor ring node
Table 204 – State-event-action matrix for Announce frame basednon-supervisor ring node
358 10.11.3 Ring supervisor
Figure 42 – State transition diagram for ring supervisor
359 Table 205 – Parameter values for ring supervisor node
360 Table 206 – LastBcnRcvPort bit definitions
Table 207 – State-event-action matrix for ring supervisor node
373 10.11.4 Redundant gateway
Figure 43 – State transition diagram for redundant gateway
Table 208 – Parameter values for redundant gateway node
374 Table 209 – State-event-action matrix for redundant gateway node
376 10.12 Performance analysis
10.12.1 General
377 Table 210 – Parameters/assumptions for example performance calculations
380 10.12.2 Redundant gateway switchover performance
Table 211 – Example ring configuration parameters and performance
381 Table 212 – Variables for performance analysis
382 11 PRP and HSR redundancy protocols
11.1 General
11.2 PRP overview
11.2.1 General
383 11.2.2 Address Conflict Detection (ACD)
Figure 44 – PRP network
384 11.3 HSR overview
Figure 45 – Directly Attached SANs
Figure 46 – Virtual DANs
385 12 LLDP protocol
12.1 General
Figure 47 – HSR network
386 12.2 LLDP overview
12.3 Type 2 LLDP Transmission Requirements
12.3.1 General
Figure 48 – IEEE LLDP PDU Format (source IEEE Std 802.1AB-2016)
Table 213 – LLDP support requirements
387 12.3.2 Chassis ID TLV (TLV Type = 1)
12.3.3 Port ID TLV (TLV Type = 2)
Figure 49 – Type 2 LLDP PDU Format
Table 214 – LLDP TLV Type Values
388 12.3.4 System Capabilities TLV (TLV Type = 7)
12.3.5 Management Address (TLV Type = 8)
12.3.6 Type 2 Identification TLV (TLV Type = 127)
12.3.7 Type 2 MAC Address TLV (TLV Type = 127)
12.3.8 Type 2 Interface Label TLV (TLV Type = 127)
Figure 50 – Type 2 Identification TLV Format
Figure 51 – Type 2 MAC Address TLV Format
389 12.3.9 Additional Ethernet Capabilities TLV (TLV Type = 127)
12.4 Type 2 LLDP Reception Requirements
12.5 Type 2 LLDP Reporting Requirements
12.6 EtherNet/IP LLDP Link State Transition Requirements
Figure 52 – Type 2 Interface Label TLV Format
390 Annex A (normative)Indicators and switches
A.1 Purpose
A.2 Indicators
A.2.1 General indicator requirements
A.2.2 Common indicator requirements
391 Table A.1 – Module status indicator
392 A.2.3 Fieldbus specific indicator requirements – option 1
Table A.2 – Time Sync status indication
394 Table A.3 – Network status indicators
396 A.2.4 Fieldbus specific indicator requirements – option 2
Figure A.1 – Non redundant network status indicator labeling
Figure A.2 – Redundant network status indicator labeling
398 Table A.4 – Network status indicator
399 Figure A.3 – Network status indicator state diagram
Figure A.4 – Examples of multiple network status indicators
400 A.2.5 Fieldbus specific indicator requirements – option 3
Table A.5 – Combined Module/Network status indicator
402 Table A.6 – Network status indicator
403 Table A.7 – Combined module/network status indicator
404 Table A.8 – I/O status indicator
405 A.3 Switches
A.3.1 Common switch requirements
A.3.2 Fieldbus specific switch requirements – option 1
A.3.3 Fieldbus specific switch requirements – option 2
406 A.3.4 Fieldbus specific switch requirements – option 3
Table A.9 – Bit rate switch encoding
407 Bibliography

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