{"id":244005,"date":"2024-10-19T16:01:20","date_gmt":"2024-10-19T16:01:20","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61158-4-22012\/"},"modified":"2024-10-25T10:59:26","modified_gmt":"2024-10-25T10:59:26","slug":"bs-en-61158-4-22012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61158-4-22012\/","title":{"rendered":"BS EN 61158-4-2:2012"},"content":{"rendered":"
The data-link layer provides basic time-critical messaging communications between devices in an automation environment.<\/p>\n
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.<\/p>\n
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.<\/p>\n
This protocol provides means to maintain clock synchronization across an extended link with a precision better than 10 \u03bcs.<\/p>\n
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.<\/p>\n
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.<\/p>\n
PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
---|---|---|---|---|---|---|---|
7<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
14<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
16<\/td>\n | 1 Scope 1.1 General 1.2 Specifications 1.3 Procedures <\/td>\n<\/tr>\n | ||||||
17<\/td>\n | 1.4 Applicability 1.5 Conformance 2 Normative references <\/td>\n<\/tr>\n | ||||||
18<\/td>\n | 3 Terms, definitions, symbols and abbreviations 3.1 Reference model terms and definitions <\/td>\n<\/tr>\n | ||||||
20<\/td>\n | 3.2 Service convention terms and definitions <\/td>\n<\/tr>\n | ||||||
21<\/td>\n | 3.3 Common terms and definitions <\/td>\n<\/tr>\n | ||||||
22<\/td>\n | Figures Figure 1 \u2013 Relationships of DLSAPs, DLSAP-addresses and group DL addresses <\/td>\n<\/tr>\n | ||||||
23<\/td>\n | 3.4 Additional Type 2 definitions <\/td>\n<\/tr>\n | ||||||
30<\/td>\n | 3.5 Type 2 symbols and abbreviations <\/td>\n<\/tr>\n | ||||||
31<\/td>\n | 4 Overview of the data-link protocol 4.1 General <\/td>\n<\/tr>\n | ||||||
32<\/td>\n | Figure 2 \u2013 Data-link layer internal architecture Tables Table 1 \u2013 Data-link layer components <\/td>\n<\/tr>\n | ||||||
33<\/td>\n | 4.2 Services provided by the DL <\/td>\n<\/tr>\n | ||||||
34<\/td>\n | 4.3 Structure and definition of DL addresses Figure 3 \u2013 Basic structure of a MAC ID address <\/td>\n<\/tr>\n | ||||||
35<\/td>\n | Figure 4 \u2013 Basic structure of a generic tag address Figure 5 \u2013 Basic structure of a fixed tag address Table 2 \u2013 MAC ID addresses allocation <\/td>\n<\/tr>\n | ||||||
36<\/td>\n | 4.4 Services assumed from the PhL Table 3 \u2013 Fixed tag service definitions <\/td>\n<\/tr>\n | ||||||
37<\/td>\n | Figure\u00a06 \u2013 M_symbols and Manchester encoding at 5 MHz Table 4 \u2013 Data encoding rules <\/td>\n<\/tr>\n | ||||||
38<\/td>\n | Table 5 \u2013 M Data symbols Table 6 \u2013 Truth table for ph_status_indication <\/td>\n<\/tr>\n | ||||||
39<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
40<\/td>\n | Figure 7 \u2013 NUT structure <\/td>\n<\/tr>\n | ||||||
41<\/td>\n | Figure 8 \u2013 Media access during scheduled time <\/td>\n<\/tr>\n | ||||||
42<\/td>\n | Figure 9 \u2013 Media access during unscheduled time <\/td>\n<\/tr>\n | ||||||
43<\/td>\n | 5.3 DLPDU structure and encoding Figure 10 \u2013 DLPDU format <\/td>\n<\/tr>\n | ||||||
44<\/td>\n | Table 7 \u2013 FCS length, polynomials and constants <\/td>\n<\/tr>\n | ||||||
46<\/td>\n | Figure 11 \u2013 Aborting a DLPDU during transmission <\/td>\n<\/tr>\n | ||||||
47<\/td>\n | 5.4 Lpacket components Figure 12 \u2013 Lpacket format <\/td>\n<\/tr>\n | ||||||
48<\/td>\n | Figure 13 \u2013 Generic tag Lpacket format <\/td>\n<\/tr>\n | ||||||
49<\/td>\n | 5.5 DLPDU procedures Figure 14 \u2013 Fixed tag Lpacket format <\/td>\n<\/tr>\n | ||||||
50<\/td>\n | 5.6 Summary of DLL support services and objects <\/td>\n<\/tr>\n | ||||||
51<\/td>\n | Table\u00a08 \u2013 DLL support services and objects <\/td>\n<\/tr>\n | ||||||
52<\/td>\n | 6 Specific DLPDU structure, encoding and procedures 6.1 Modeling language <\/td>\n<\/tr>\n | ||||||
54<\/td>\n | 6.2 DLS user services Table 9 \u2013 Elementary data types <\/td>\n<\/tr>\n | ||||||
58<\/td>\n | Table 10 \u2013 DLL events <\/td>\n<\/tr>\n | ||||||
60<\/td>\n | 6.3 Generic tag Lpacket <\/td>\n<\/tr>\n | ||||||
61<\/td>\n | 6.4 Moderator Lpacket <\/td>\n<\/tr>\n | ||||||
62<\/td>\n | 6.5 Time distribution Lpacket <\/td>\n<\/tr>\n | ||||||
63<\/td>\n | Figure 15 \u2013 Goodness parameter of TimeDist_Lpacket Table 11 \u2013 Time distribution priority <\/td>\n<\/tr>\n | ||||||
64<\/td>\n | 6.6 UCMM Lpacket <\/td>\n<\/tr>\n | ||||||
65<\/td>\n | 6.7 Keeper UCMM Lpacket 6.8 TUI Lpacket <\/td>\n<\/tr>\n | ||||||
66<\/td>\n | 6.9 Link parameters Lpacket and tMinus Lpacket Table 12 \u2013 Format of the TUI Lpacket <\/td>\n<\/tr>\n | ||||||
68<\/td>\n | 6.10 I\u2019m-alive Lpacket <\/td>\n<\/tr>\n | ||||||
69<\/td>\n | 6.11 Ping Lpackets Figure 16 \u2013 Example I\u2019m alive processing algorithm <\/td>\n<\/tr>\n | ||||||
71<\/td>\n | 6.12 WAMI Lpacket 6.13 Debug Lpacket <\/td>\n<\/tr>\n | ||||||
72<\/td>\n | 6.14 IP Lpacket 6.15 Ethernet Lpacket 7 Objects for station management 7.1 General <\/td>\n<\/tr>\n | ||||||
73<\/td>\n | 7.2 ControlNet object <\/td>\n<\/tr>\n | ||||||
74<\/td>\n | Table 13 \u2013 ControlNet object class attributes Table 14 \u2013 ControlNet object instance attributes <\/td>\n<\/tr>\n | ||||||
78<\/td>\n | Table 15 \u2013 TUI status flag bits <\/td>\n<\/tr>\n | ||||||
79<\/td>\n | Table 16 \u2013 Channel state bits <\/td>\n<\/tr>\n | ||||||
81<\/td>\n | Table 17 \u2013 ControlNet object common services <\/td>\n<\/tr>\n | ||||||
82<\/td>\n | Table 18 \u2013 ControlNet object class specific services <\/td>\n<\/tr>\n | ||||||
83<\/td>\n | 7.3 Keeper object <\/td>\n<\/tr>\n | ||||||
84<\/td>\n | Table 19 \u2013 Keeper object revision history Table 20 \u2013 Keeper object class attributes <\/td>\n<\/tr>\n | ||||||
85<\/td>\n | Table 21 \u2013 Keeper object instance attributes <\/td>\n<\/tr>\n | ||||||
87<\/td>\n | Table 22 \u2013 Keeper operating state definitions <\/td>\n<\/tr>\n | ||||||
88<\/td>\n | Table 23 \u2013 Port status flag bit definitions <\/td>\n<\/tr>\n | ||||||
89<\/td>\n | Table 24 \u2013 TUI status flag bits <\/td>\n<\/tr>\n | ||||||
90<\/td>\n | Figure 17 \u2013 Keeper CRC algorithm <\/td>\n<\/tr>\n | ||||||
91<\/td>\n | Table 25 \u2013 Keeper attributes <\/td>\n<\/tr>\n | ||||||
92<\/td>\n | Table 26 \u2013 Memory requirements (in octets) for the Keeper attributes Table 27 \u2013 Keeper object common services <\/td>\n<\/tr>\n | ||||||
93<\/td>\n | Table 28 \u2013 Keeper object class specific services <\/td>\n<\/tr>\n | ||||||
94<\/td>\n | Table\u00a029 \u2013 Service error codes <\/td>\n<\/tr>\n | ||||||
98<\/td>\n | Table 30 \u2013 Wire order format of the TUI Lpacket <\/td>\n<\/tr>\n | ||||||
99<\/td>\n | Table 31 \u2013 Service error codes Table 32 \u2013 Keeper object operating states <\/td>\n<\/tr>\n | ||||||
101<\/td>\n | Figure 18 \u2013 Keeper object power-up state diagram <\/td>\n<\/tr>\n | ||||||
102<\/td>\n | Figure\u00a019 \u2013 Keeper object operating state diagram <\/td>\n<\/tr>\n | ||||||
103<\/td>\n | Table 33 \u2013 Keeper object state event matrix <\/td>\n<\/tr>\n | ||||||
105<\/td>\n | 7.4 Scheduling object Figure 20 \u2013 Synchronized network change processing <\/td>\n<\/tr>\n | ||||||
106<\/td>\n | Table\u00a034 \u2013 Scheduling object class attributes <\/td>\n<\/tr>\n | ||||||
107<\/td>\n | Table 35 \u2013 Scheduling object instance attributes Table 36 \u2013 Scheduling object common services <\/td>\n<\/tr>\n | ||||||
108<\/td>\n | Table 37 \u2013 Status error descriptions for Create <\/td>\n<\/tr>\n | ||||||
109<\/td>\n | Table 38 \u2013 Status error descriptions for Delete and Kick_Timer Table\u00a039 \u2013 Scheduling object class specific services <\/td>\n<\/tr>\n | ||||||
111<\/td>\n | Table 40 \u2013 Status error descriptions for Read <\/td>\n<\/tr>\n | ||||||
112<\/td>\n | Table 41 \u2013 Status error descriptions for Conditional_Write Table 42 \u2013 Status error descriptions for Forced_Write <\/td>\n<\/tr>\n | ||||||
113<\/td>\n | Table 43 \u2013 Status error descriptions for Change_Start Table\u00a044 \u2013 Status error descriptions for Break_Connections <\/td>\n<\/tr>\n | ||||||
114<\/td>\n | Table 45 \u2013 Status error descriptions for Change_Complete <\/td>\n<\/tr>\n | ||||||
115<\/td>\n | Table 46 \u2013 Status error descriptions for Restart_Connections <\/td>\n<\/tr>\n | ||||||
116<\/td>\n | 7.5 TCP\/IP Interface object Table 47 \u2013 TCP\/IP Interface object class attributes <\/td>\n<\/tr>\n | ||||||
117<\/td>\n | Table 48 \u2013 TCP\/IP Interface object instance attributes <\/td>\n<\/tr>\n | ||||||
119<\/td>\n | Table 49 \u2013 Status bits Table 50 \u2013 Configuration capability bits <\/td>\n<\/tr>\n | ||||||
120<\/td>\n | Table 51 \u2013 Configuration control bits Table 52 \u2013 Example path <\/td>\n<\/tr>\n | ||||||
121<\/td>\n | Table 53 \u2013 Interface configuration components <\/td>\n<\/tr>\n | ||||||
122<\/td>\n | Table 54 \u2013 Alloc control values <\/td>\n<\/tr>\n | ||||||
123<\/td>\n | Table 55 \u2013 TCP\/IP Interface object common services Table 56 \u2013 Get_Attribute_All reply format <\/td>\n<\/tr>\n | ||||||
125<\/td>\n | 7.6 Ethernet link object Figure 21 \u2013 State transition diagram for TCP\/IP Interface object Table 57 \u2013 Ethernet link object revision history <\/td>\n<\/tr>\n | ||||||
126<\/td>\n | Table 58 \u2013 Ethernet link object class attributes <\/td>\n<\/tr>\n | ||||||
127<\/td>\n | Table 59 \u2013 Ethernet link object instance attributes <\/td>\n<\/tr>\n | ||||||
130<\/td>\n | Table 60 \u2013 Interface flags bits <\/td>\n<\/tr>\n | ||||||
131<\/td>\n | Table 61 \u2013 Control bits Table 62 \u2013 Interface type <\/td>\n<\/tr>\n | ||||||
132<\/td>\n | Table 63 \u2013 Interface state Table 64 \u2013 Admin state Table 65 \u2013 Ethernet Link object common services <\/td>\n<\/tr>\n | ||||||
133<\/td>\n | 7.7 DeviceNet object Table 66 \u2013 Ethernet Link object class specific services <\/td>\n<\/tr>\n | ||||||
134<\/td>\n | Table 67 \u2013 DeviceNet object revision history Table 68 \u2013 DeviceNet object class attributes <\/td>\n<\/tr>\n | ||||||
135<\/td>\n | Table 69 \u2013 DeviceNet object instance attributes <\/td>\n<\/tr>\n | ||||||
137<\/td>\n | Table 70 \u2013 Bit rate attribute values <\/td>\n<\/tr>\n | ||||||
138<\/td>\n | Table 71 \u2013 BOI attribute values <\/td>\n<\/tr>\n | ||||||
139<\/td>\n | Table 72 \u2013 Diagnostic counters bit description <\/td>\n<\/tr>\n | ||||||
140<\/td>\n | Table 73 \u2013 DeviceNet object common services <\/td>\n<\/tr>\n | ||||||
141<\/td>\n | Table 74 \u2013 Reset service parameter Table 75 \u2013 Reset service parameter values <\/td>\n<\/tr>\n | ||||||
142<\/td>\n | 7.8 Connection configuration object (CCO) Table 76 \u2013 DeviceNet object class specific services <\/td>\n<\/tr>\n | ||||||
143<\/td>\n | Table 77 \u2013 Connection configuration object revision history <\/td>\n<\/tr>\n | ||||||
144<\/td>\n | Table\u00a078 \u2013 Connection configuration object class attributes <\/td>\n<\/tr>\n | ||||||
145<\/td>\n | Table 79 \u2013 Format number values <\/td>\n<\/tr>\n | ||||||
146<\/td>\n | Table 80 \u2013 Connection configuration object instance attributes <\/td>\n<\/tr>\n | ||||||
148<\/td>\n | Table 81 \u2013 Originator connection status values <\/td>\n<\/tr>\n | ||||||
149<\/td>\n | Table 82 \u2013 Target connection status values Table 83 \u2013 Connection flags <\/td>\n<\/tr>\n | ||||||
151<\/td>\n | Table 84 \u2013 I\/O mapping formats <\/td>\n<\/tr>\n | ||||||
152<\/td>\n | Table\u00a085 \u2013 Connection configuration object common services Table 86 \u2013 Get_Attribute_All error codes <\/td>\n<\/tr>\n | ||||||
153<\/td>\n | Table 87 \u2013 Get_Attribute_All response <\/td>\n<\/tr>\n | ||||||
154<\/td>\n | Table 88 \u2013 Set_Attribute_All error codes <\/td>\n<\/tr>\n | ||||||
155<\/td>\n | Table 89 \u2013 Set_Attribute_All request <\/td>\n<\/tr>\n | ||||||
156<\/td>\n | Table 90 \u2013 Create request parameters <\/td>\n<\/tr>\n | ||||||
157<\/td>\n | Table 91 \u2013 Create error codes Table 92 \u2013 Delete error codes Table 93 \u2013 Restore error codes <\/td>\n<\/tr>\n | ||||||
158<\/td>\n | Table 94 \u2013 Connection configuration object class specific services Table 95 \u2013 Kick_Timer error codes <\/td>\n<\/tr>\n | ||||||
159<\/td>\n | Table 96 \u2013 Open_Connection error codes Table 97 \u2013 Close_Connection error codes Table 98 \u2013 Stop_Connection error codes <\/td>\n<\/tr>\n | ||||||
160<\/td>\n | Table 99 \u2013 Change_Start error codes Table 100 \u2013 Get_Status service parameter Table 101 \u2013 Get_Status service response <\/td>\n<\/tr>\n | ||||||
161<\/td>\n | Table 102 \u2013 Get_Status service error codes Table 103 \u2013 Change_Complete service parameter Table 104 \u2013 Change_Complete service error codes <\/td>\n<\/tr>\n | ||||||
162<\/td>\n | Table 105 \u2013 Audit_Changes service parameter Table 106 \u2013 Audit_Changes service error codes <\/td>\n<\/tr>\n | ||||||
163<\/td>\n | 7.9 DLR object Figure 22 \u2013 Connection configuration object edit flowchart <\/td>\n<\/tr>\n | ||||||
164<\/td>\n | Table 107 \u2013 Class attributes Table 108 \u2013Instance attributes <\/td>\n<\/tr>\n | ||||||
166<\/td>\n | Table 109 \u2013 Network Status values <\/td>\n<\/tr>\n | ||||||
167<\/td>\n | Table 110 \u2013 Ring Supervisor Status values <\/td>\n<\/tr>\n | ||||||
170<\/td>\n | Table 111 \u2013 DLR object common services Table 112 \u2013 Get_Attributes_All Response \u2013 non supervisor device Table 113 \u2013 Get_Attributes_All Response \u2013 supervisor-capable device <\/td>\n<\/tr>\n | ||||||
171<\/td>\n | Table 114 \u2013 DLR object class specific services <\/td>\n<\/tr>\n | ||||||
172<\/td>\n | 7.10 QoS object Table 115 \u2013 QoS object revision history Table 116 \u2013 QoS object class attributes <\/td>\n<\/tr>\n | ||||||
173<\/td>\n | Table 117 \u2013 QoS object instance attributes <\/td>\n<\/tr>\n | ||||||
174<\/td>\n | 8 Other DLE elements of procedure 8.1 Network attachment monitor (NAM) Table 118 \u2013 Default DCSP values and usages Table 119 \u2013 Common services <\/td>\n<\/tr>\n | ||||||
175<\/td>\n | Figure 23 \u2013 NAM state machine Table 120 \u2013 NAM states <\/td>\n<\/tr>\n | ||||||
176<\/td>\n | Table 121 \u2013 Default link parameters <\/td>\n<\/tr>\n | ||||||
181<\/td>\n | 8.2 Calculating link parameters <\/td>\n<\/tr>\n | ||||||
182<\/td>\n | Table 122 \u2013 PhL timing characteristics <\/td>\n<\/tr>\n | ||||||
189<\/td>\n | 9 Detailed specification of DL components 9.1 General 9.2 Access control machine (ACM) <\/td>\n<\/tr>\n | ||||||
206<\/td>\n | 9.3 TxLLC <\/td>\n<\/tr>\n | ||||||
210<\/td>\n | 9.4 RxLLC <\/td>\n<\/tr>\n | ||||||
213<\/td>\n | 9.5 Transmit machine (TxM) <\/td>\n<\/tr>\n | ||||||
216<\/td>\n | 9.6 Receive machine (RxM) <\/td>\n<\/tr>\n | ||||||
222<\/td>\n | 9.7 Serializer <\/td>\n<\/tr>\n | ||||||
223<\/td>\n | 9.8 Deserializer <\/td>\n<\/tr>\n | ||||||
224<\/td>\n | 9.9 DLL management <\/td>\n<\/tr>\n | ||||||
226<\/td>\n | 10 Device Level Ring (DLR) protocol 10.1 General 10.2 Supported topologies <\/td>\n<\/tr>\n | ||||||
227<\/td>\n | Figure 24 \u2013 DLR rings connected to switches <\/td>\n<\/tr>\n | ||||||
228<\/td>\n | 10.3 Overview of DLR operation Figure 25 \u2013 Normal operation of a DLR network Figure 26 \u2013 Beacon and Announce frames <\/td>\n<\/tr>\n | ||||||
229<\/td>\n | Figure 27 \u2013 Link failure <\/td>\n<\/tr>\n | ||||||
230<\/td>\n | 10.4 Classes of DLR implementation Figure 28 \u2013 Network reconfiguration after link failure <\/td>\n<\/tr>\n | ||||||
231<\/td>\n | 10.5 DLR behavior Table 123 \u2013 DLR variables <\/td>\n<\/tr>\n | ||||||
236<\/td>\n | 10.6 Implementation requirements Figure 29 \u2013 Neighbor Check process <\/td>\n<\/tr>\n | ||||||
238<\/td>\n | 10.7 Using non-DLR nodes in the ring network <\/td>\n<\/tr>\n | ||||||
240<\/td>\n | Figure 30 \u2013 Unsupported topology \u2013 example 1 Figure 31 \u2013 Unsupported topology \u2013 example 2 <\/td>\n<\/tr>\n | ||||||
241<\/td>\n | 10.8 DLR messages <\/td>\n<\/tr>\n | ||||||
242<\/td>\n | Table 124 \u2013 MAC addresses for DLR messages Table 125 \u2013 IEEE\u00a0802.1Q frame format Table 126 \u2013 Common fields in DLR messages <\/td>\n<\/tr>\n | ||||||
243<\/td>\n | Table 127 \u2013 Format of the Beacon frame Table 128 \u2013 Ring State values <\/td>\n<\/tr>\n | ||||||
244<\/td>\n | Table 129 \u2013 Format of the Neighbor_Check request Table 130 \u2013 Format of the Neighbor_Check response Table 131 \u2013 Format of the Link_Status\/Neighbor_Status frame <\/td>\n<\/tr>\n | ||||||
245<\/td>\n | Table 132 \u2013 Link\/Neighbor status values Table 133 \u2013 Format of the Announce frame Table 134 \u2013 Format of the Sign_On frame <\/td>\n<\/tr>\n | ||||||
246<\/td>\n | 10.9 State diagrams and state-event-action matrices Figure 32 \u2013 State transition diagram for Beacon frame based non-supervisor ring node Table 135 \u2013 Parameter values for Beacon frame based non-supervisor ring node <\/td>\n<\/tr>\n | ||||||
247<\/td>\n | Table 136 \u2013 State-event-action matrix for Beacon frame based non-supervisor ring node <\/td>\n<\/tr>\n | ||||||
251<\/td>\n | Figure 33 \u2013 State transition diagram for Announce frame based non-supervisor ring node Table 137 \u2013 Parameter values for Announce frame based non-supervisor ring node <\/td>\n<\/tr>\n | ||||||
252<\/td>\n | Table 138 \u2013 State-event-action matrix for Announce frame based non-supervisor ring node <\/td>\n<\/tr>\n | ||||||
254<\/td>\n | Figure 34 \u2013 State transition diagram for ring supervisor <\/td>\n<\/tr>\n | ||||||
255<\/td>\n | Table 139 \u2013 Parameter values for ring supervisor node <\/td>\n<\/tr>\n | ||||||
256<\/td>\n | Table 140 \u2013 State-event-action matrix for ring supervisor node <\/td>\n<\/tr>\n | ||||||
267<\/td>\n | 10.10 Performance analysis Table 141 \u2013 Parameters\/assumptions for example performance calculations <\/td>\n<\/tr>\n | ||||||
270<\/td>\n | Table 142 \u2013 Example ring configuration parameters and performance <\/td>\n<\/tr>\n | ||||||
271<\/td>\n | Annex A (normative) Indicators and switches <\/td>\n<\/tr>\n | ||||||
272<\/td>\n | Table A.1 \u2013 Module status indicator <\/td>\n<\/tr>\n | ||||||
273<\/td>\n | Table A.2 \u2013 Network status indicators <\/td>\n<\/tr>\n | ||||||
275<\/td>\n | Figure A.1 \u2013 Non redundant network status indicator labeling <\/td>\n<\/tr>\n | ||||||
276<\/td>\n | Figure A.2 \u2013 Redundant network status indicator labeling <\/td>\n<\/tr>\n | ||||||
277<\/td>\n | Table A.3 \u2013 Network status indicator <\/td>\n<\/tr>\n | ||||||
279<\/td>\n | Table A.4 \u2013 Network status indicator <\/td>\n<\/tr>\n | ||||||
280<\/td>\n | Table A.5 \u2013 Combined module\/network status indicator <\/td>\n<\/tr>\n | ||||||
281<\/td>\n | Table A.6 \u2013 I\/O status indicator <\/td>\n<\/tr>\n | ||||||
283<\/td>\n | Table A.7 \u2013 Bit rate switch encoding <\/td>\n<\/tr>\n | ||||||
284<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 2 elements<\/b><\/p>\n |