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BS EN 61158-4-2:2012

BS EN 61158-4-2:2012

$215.11

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

Published By Publication Date Number of Pages
BSI 2012 286
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The data-link layer provides basic time-critical messaging communications between devices in an automation environment.

This protocol provides communication opportunities to all participating data-link entities, sequentially and in a cyclic synchronous manner. Foreground scheduled access is available for time-critical activities together with background unscheduled access for less critical activities.

Deterministic and synchronized transfers can be provided at cyclic intervals up to 1 ms and device separations of 25 km. This performance is adjustable dynamically and on-line by re- configuring the parameters of the local link whilst normal operation continues. By similar means, DL connections and new devices may be added or removed during normal operation.

This protocol provides means to maintain clock synchronization across an extended link with a precision better than 10 ฮผs.

This protocol optimizes each access opportunity by concatenating multiple DLSDUs and associated DLPCI into a single DLPDU, thereby improving data transfer efficiency for data-link entities that actively source multiple streams of data.

The maximum system size is an unlimited number of links of 99 nodes, each with 255 DLSAP-addresses. Each link has a maximum of 224 related peer and publisher DLCEPs.

PDF Catalog

PDF Pages PDF Title
7 CONTENTS
14 INTRODUCTION
16 1 Scope
1.1 General
1.2 Specifications
1.3 Procedures
17 1.4 Applicability
1.5 Conformance
2 Normative references
18 3 Terms, definitions, symbols and abbreviations
3.1 Reference model terms and definitions
20 3.2 Service convention terms and definitions
21 3.3 Common terms and definitions
22 Figures
Figure 1 โ€“ Relationships of DLSAPs, DLSAP-addresses and group DL addresses
23 3.4 Additional Type 2 definitions
30 3.5 Type 2 symbols and abbreviations
31 4 Overview of the data-link protocol
4.1 General
32 Figure 2 โ€“ Data-link layer internal architecture
Tables
Table 1 โ€“ Data-link layer components
33 4.2 Services provided by the DL
34 4.3 Structure and definition of DL addresses
Figure 3 โ€“ Basic structure of a MAC ID address
35 Figure 4 โ€“ Basic structure of a generic tag address
Figure 5 โ€“ Basic structure of a fixed tag address
Table 2 โ€“ MAC ID addresses allocation
36 4.4 Services assumed from the PhL
Table 3 โ€“ Fixed tag service definitions
37 Figureย 6 โ€“ M_symbols and Manchester encoding at 5 MHz
Table 4 โ€“ Data encoding rules
38 Table 5 โ€“ M Data symbols
Table 6 โ€“ Truth table for ph_status_indication
39 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
40 Figure 7 โ€“ NUT structure
41 Figure 8 โ€“ Media access during scheduled time
42 Figure 9 โ€“ Media access during unscheduled time
43 5.3 DLPDU structure and encoding
Figure 10 โ€“ DLPDU format
44 Table 7 โ€“ FCS length, polynomials and constants
46 Figure 11 โ€“ Aborting a DLPDU during transmission
47 5.4 Lpacket components
Figure 12 โ€“ Lpacket format
48 Figure 13 โ€“ Generic tag Lpacket format
49 5.5 DLPDU procedures
Figure 14 โ€“ Fixed tag Lpacket format
50 5.6 Summary of DLL support services and objects
51 Tableย 8 โ€“ DLL support services and objects
52 6 Specific DLPDU structure, encoding and procedures
6.1 Modeling language
54 6.2 DLS user services
Table 9 โ€“ Elementary data types
58 Table 10 โ€“ DLL events
60 6.3 Generic tag Lpacket
61 6.4 Moderator Lpacket
62 6.5 Time distribution Lpacket
63 Figure 15 โ€“ Goodness parameter of TimeDist_Lpacket
Table 11 โ€“ Time distribution priority
64 6.6 UCMM Lpacket
65 6.7 Keeper UCMM Lpacket
6.8 TUI Lpacket
66 6.9 Link parameters Lpacket and tMinus Lpacket
Table 12 โ€“ Format of the TUI Lpacket
68 6.10 Iโ€™m-alive Lpacket
69 6.11 Ping Lpackets
Figure 16 โ€“ Example Iโ€™m alive processing algorithm
71 6.12 WAMI Lpacket
6.13 Debug Lpacket
72 6.14 IP Lpacket
6.15 Ethernet Lpacket
7 Objects for station management
7.1 General
73 7.2 ControlNet object
74 Table 13 โ€“ ControlNet object class attributes
Table 14 โ€“ ControlNet object instance attributes
78 Table 15 โ€“ TUI status flag bits
79 Table 16 โ€“ Channel state bits
81 Table 17 โ€“ ControlNet object common services
82 Table 18 โ€“ ControlNet object class specific services
83 7.3 Keeper object
84 Table 19 โ€“ Keeper object revision history
Table 20 โ€“ Keeper object class attributes
85 Table 21 โ€“ Keeper object instance attributes
87 Table 22 โ€“ Keeper operating state definitions
88 Table 23 โ€“ Port status flag bit definitions
89 Table 24 โ€“ TUI status flag bits
90 Figure 17 โ€“ Keeper CRC algorithm
91 Table 25 โ€“ Keeper attributes
92 Table 26 โ€“ Memory requirements (in octets) for the Keeper attributes
Table 27 โ€“ Keeper object common services
93 Table 28 โ€“ Keeper object class specific services
94 Tableย 29 โ€“ Service error codes
98 Table 30 โ€“ Wire order format of the TUI Lpacket
99 Table 31 โ€“ Service error codes
Table 32 โ€“ Keeper object operating states
101 Figure 18 โ€“ Keeper object power-up state diagram
102 Figureย 19 โ€“ Keeper object operating state diagram
103 Table 33 โ€“ Keeper object state event matrix
105 7.4 Scheduling object
Figure 20 โ€“ Synchronized network change processing
106 Tableย 34 โ€“ Scheduling object class attributes
107 Table 35 โ€“ Scheduling object instance attributes
Table 36 โ€“ Scheduling object common services
108 Table 37 โ€“ Status error descriptions for Create
109 Table 38 โ€“ Status error descriptions for Delete and Kick_Timer
Tableย 39 โ€“ Scheduling object class specific services
111 Table 40 โ€“ Status error descriptions for Read
112 Table 41 โ€“ Status error descriptions for Conditional_Write
Table 42 โ€“ Status error descriptions for Forced_Write
113 Table 43 โ€“ Status error descriptions for Change_Start
Tableย 44 โ€“ Status error descriptions for Break_Connections
114 Table 45 โ€“ Status error descriptions for Change_Complete
115 Table 46 โ€“ Status error descriptions for Restart_Connections
116 7.5 TCP/IP Interface object
Table 47 โ€“ TCP/IP Interface object class attributes
117 Table 48 โ€“ TCP/IP Interface object instance attributes
119 Table 49 โ€“ Status bits
Table 50 โ€“ Configuration capability bits
120 Table 51 โ€“ Configuration control bits
Table 52 โ€“ Example path
121 Table 53 โ€“ Interface configuration components
122 Table 54 โ€“ Alloc control values
123 Table 55 โ€“ TCP/IP Interface object common services
Table 56 โ€“ Get_Attribute_All reply format
125 7.6 Ethernet link object
Figure 21 โ€“ State transition diagram for TCP/IP Interface object
Table 57 โ€“ Ethernet link object revision history
126 Table 58 โ€“ Ethernet link object class attributes
127 Table 59 โ€“ Ethernet link object instance attributes
130 Table 60 โ€“ Interface flags bits
131 Table 61 โ€“ Control bits
Table 62 โ€“ Interface type
132 Table 63 โ€“ Interface state
Table 64 โ€“ Admin state
Table 65 โ€“ Ethernet Link object common services
133 7.7 DeviceNet object
Table 66 โ€“ Ethernet Link object class specific services
134 Table 67 โ€“ DeviceNet object revision history
Table 68 โ€“ DeviceNet object class attributes
135 Table 69 โ€“ DeviceNet object instance attributes
137 Table 70 โ€“ Bit rate attribute values
138 Table 71 โ€“ BOI attribute values
139 Table 72 โ€“ Diagnostic counters bit description
140 Table 73 โ€“ DeviceNet object common services
141 Table 74 โ€“ Reset service parameter
Table 75 โ€“ Reset service parameter values
142 7.8 Connection configuration object (CCO)
Table 76 โ€“ DeviceNet object class specific services
143 Table 77 โ€“ Connection configuration object revision history
144 Tableย 78 โ€“ Connection configuration object class attributes
145 Table 79 โ€“ Format number values
146 Table 80 โ€“ Connection configuration object instance attributes
148 Table 81 โ€“ Originator connection status values
149 Table 82 โ€“ Target connection status values
Table 83 โ€“ Connection flags
151 Table 84 โ€“ I/O mapping formats
152 Tableย 85 โ€“ Connection configuration object common services
Table 86 โ€“ Get_Attribute_All error codes
153 Table 87 โ€“ Get_Attribute_All response
154 Table 88 โ€“ Set_Attribute_All error codes
155 Table 89 โ€“ Set_Attribute_All request
156 Table 90 โ€“ Create request parameters
157 Table 91 โ€“ Create error codes
Table 92 โ€“ Delete error codes
Table 93 โ€“ Restore error codes
158 Table 94 โ€“ Connection configuration object class specific services
Table 95 โ€“ Kick_Timer error codes
159 Table 96 โ€“ Open_Connection error codes
Table 97 โ€“ Close_Connection error codes
Table 98 โ€“ Stop_Connection error codes
160 Table 99 โ€“ Change_Start error codes
Table 100 โ€“ Get_Status service parameter
Table 101 โ€“ Get_Status service response
161 Table 102 โ€“ Get_Status service error codes
Table 103 โ€“ Change_Complete service parameter
Table 104 โ€“ Change_Complete service error codes
162 Table 105 โ€“ Audit_Changes service parameter
Table 106 โ€“ Audit_Changes service error codes
163 7.9 DLR object
Figure 22 โ€“ Connection configuration object edit flowchart
164 Table 107 โ€“ Class attributes
Table 108 โ€“Instance attributes
166 Table 109 โ€“ Network Status values
167 Table 110 โ€“ Ring Supervisor Status values
170 Table 111 โ€“ DLR object common services
Table 112 โ€“ Get_Attributes_All Response โ€“ non supervisor device
Table 113 โ€“ Get_Attributes_All Response โ€“ supervisor-capable device
171 Table 114 โ€“ DLR object class specific services
172 7.10 QoS object
Table 115 โ€“ QoS object revision history
Table 116 โ€“ QoS object class attributes
173 Table 117 โ€“ QoS object instance attributes
174 8 Other DLE elements of procedure
8.1 Network attachment monitor (NAM)
Table 118 โ€“ Default DCSP values and usages
Table 119 โ€“ Common services
175 Figure 23 โ€“ NAM state machine
Table 120 โ€“ NAM states
176 Table 121 โ€“ Default link parameters
181 8.2 Calculating link parameters
182 Table 122 โ€“ PhL timing characteristics
189 9 Detailed specification of DL components
9.1 General
9.2 Access control machine (ACM)
206 9.3 TxLLC
210 9.4 RxLLC
213 9.5 Transmit machine (TxM)
216 9.6 Receive machine (RxM)
222 9.7 Serializer
223 9.8 Deserializer
224 9.9 DLL management
226 10 Device Level Ring (DLR) protocol
10.1 General
10.2 Supported topologies
227 Figure 24 โ€“ DLR rings connected to switches
228 10.3 Overview of DLR operation
Figure 25 โ€“ Normal operation of a DLR network
Figure 26 โ€“ Beacon and Announce frames
229 Figure 27 โ€“ Link failure
230 10.4 Classes of DLR implementation
Figure 28 โ€“ Network reconfiguration after link failure
231 10.5 DLR behavior
Table 123 โ€“ DLR variables
236 10.6 Implementation requirements
Figure 29 โ€“ Neighbor Check process
238 10.7 Using non-DLR nodes in the ring network
240 Figure 30 โ€“ Unsupported topology โ€“ example 1
Figure 31 โ€“ Unsupported topology โ€“ example 2
241 10.8 DLR messages
242 Table 124 โ€“ MAC addresses for DLR messages
Table 125 โ€“ IEEEย 802.1Q frame format
Table 126 โ€“ Common fields in DLR messages
243 Table 127 โ€“ Format of the Beacon frame
Table 128 โ€“ Ring State values
244 Table 129 โ€“ Format of the Neighbor_Check request
Table 130 โ€“ Format of the Neighbor_Check response
Table 131 โ€“ Format of the Link_Status/Neighbor_Status frame
245 Table 132 โ€“ Link/Neighbor status values
Table 133 โ€“ Format of the Announce frame
Table 134 โ€“ Format of the Sign_On frame
246 10.9 State diagrams and state-event-action matrices
Figure 32 โ€“ State transition diagram for Beacon frame based non-supervisor ring node
Table 135 โ€“ Parameter values for Beacon frame based non-supervisor ring node
247 Table 136 โ€“ State-event-action matrix for Beacon frame based non-supervisor ring node
251 Figure 33 โ€“ State transition diagram for Announce frame based non-supervisor ring node
Table 137 โ€“ Parameter values for Announce frame based non-supervisor ring node
252 Table 138 โ€“ State-event-action matrix for Announce frame based non-supervisor ring node
254 Figure 34 โ€“ State transition diagram for ring supervisor
255 Table 139 โ€“ Parameter values for ring supervisor node
256 Table 140 โ€“ State-event-action matrix for ring supervisor node
267 10.10 Performance analysis
Table 141 โ€“ Parameters/assumptions for example performance calculations
270 Table 142 โ€“ Example ring configuration parameters and performance
271 Annex A (normative) Indicators and switches
272 Table A.1 โ€“ Module status indicator
273 Table A.2 โ€“ Network status indicators
275 Figure A.1 โ€“ Non redundant network status indicator labeling
276 Figure A.2 โ€“ Redundant network status indicator labeling
277 Table A.3 โ€“ Network status indicator
279 Table A.4 โ€“ Network status indicator
280 Table A.5 โ€“ Combined module/network status indicator
281 Table A.6 โ€“ I/O status indicator
283 Table A.7 โ€“ Bit rate switch encoding
284 Bibliography
BS EN 61158-4-2:2012
$215.11