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BS EN IEC 61158-4-21:2023

BS EN IEC 61158-4-21:2023

$215.11

Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 21 elements

Published By Publication Date Number of Pages
BSI 2023 114
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PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 CONTENTS
11 FOREWORD
13 INTRODUCTION
14 1 Scope
1.1 General
1.2 Specifications
1.3 Procedures
1.4 Applicability
1.5 Conformance
15 2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Reference model terms and definitions
17 3.2 Service convention terms and definitions
18 3.3 Common terms and definitions
21 3.4 Additional Type 21 definitions
3.5 Common symbols and abbreviations
22 3.6 Additional Type 21 symbols and abbreviations
4 Overview of the data-link protocol
4.1 General
23 4.2 Overview of medium access control
4.3 Service assumed from the physical layer
Figures
Figure 1 – Interaction of PhS primitives with DLE
24 4.4 DLL architecture
4.4.1 General
Tables
Table 1 – DLL components
25 4.4.2 DLL management (DLM) interface support function
Figure 2 – Data-link layer architecture
26 4.5 Data type
4.5.1 General
4.5.2 Boolean
4.5.3 Unsigned integer
4.5.4 Signed integer
Table 2 – UNSIGNEDn data type
27 4.5.5 Octet String
4.5.6 Visible String
4.5.7 Time of day
Table 3 – INTEGERn data type
28 4.6 Local parameters and variables
4.6.1 General
4.6.2 DLE configuration parameters
Table 4 – DLE configuration parameters
29 4.6.3 Queues to support data transfer
4.6.4 Variables to support SAP management
Table 5 – Queues to support data transfer
30 Figure 3 – Relationships of DLSAPs, DLSAPaddresses, and group DLaddresses
Table 6 – Variables to support SAP management
31 4.6.5 Variables to support local device information management
Table 7 – Variables to support device information management
Table 8 – DL–entity identifier
32 Table 9 – Device flags
Table 10 – DLM state
Table 11 – Device Unique Identification
33 Table 12 – Unique identification of device connected to R-port1
Table 13 – Unique identification of device connected to R-port2
Table 14 – MAC address
34 Table 15 – Port information
Table 16 – Protocol version
35 4.6.6 Variables and counter to support network information management
Table 17 – Device type
Table 18 – Device description
Table 19 – Hop count
36 Table 20 – Variables to support managing network information
Table 21 – Topology
Table 22 – Collision count
37 Table 23 – Device count
Table 24 – Topology change count
Table 25 – Last topology change time
Table 26 – RNMP device UID
38 Table 27 – RNMS device UID
Table 28 – LNM device UID for R-port1
Table 29 – LNM device UID for R-port2
39 4.6.7 Variables and counter to support a device path information management
Table 30 – Network flags
40 Table 31 – Variables and counter to support managing path information
Table 32 – Hop count for R-port1 direction
41 Table 33 – Hop count for R-port2 direction
Table 34 – Preferred R-port
Table 35 – Destination R-port
42 Table 36 – In net count
Table 37 – In net time
43 4.6.8 Variables, counters, timers, and queues to support path table management
5 General structure and encoding
5.1 Overview
5.2 MAPDU structure and encoding
Table 38 – Out net count
Table 39 – Out net time
44 5.3 Common MAC frame structure, encoding and elements of procedure
5.3.1 MAC frame structure
5.3.2 Elements of the MAC frame
Figure 4 – Common MAC frame format for Type 21 DLPDU
Figure 5 – MAC frame format for other protocols
45 5.3.3 Elements of the Type 21 DLPDU
Figure 6 – Version and Length field
46 Figure 7 – DST_addr field
Table 40 – Version and Length
Table 41 – Destination DL–entity identifier
47 Figure 8 – SRC_addr field
Figure 9 – Frame Control Field
Table 42 – Source DL–entity identifier
48 Table 43 – Frame control
50 Figure 10 – Extension field
51 Figure 11 – DSAP field
Table 44 – Extension
Table 45 – Destination service access point
52 Figure 12 – Source service access point field
Figure 13 – Length of group mask and extension information
Figure 14 – Group mask option field
Table 46 – source service access point
53 5.4 Order of bit transmission
5.5 Invalid DLPDU
6 DLPDU structure and procedure
6.1 General
6.2 Common DLPDU Field
6.2.1 General
54 6.2.2 Version
6.2.3 Length
6.3 DLDATA Transfer
6.3.1 DT DLPDU
Figure 15 – Common DLPDU field
Figure 16 – Building a DT DLPDU
Figure 17 – DT DLPDU structure
55 Table 47 – DT DLPDU parameters
56 Table 48 – Primitives exchanged between DLSuser and DLE to send a DT DLPDU
57 6.4 DLSPDATA Transfer
6.4.1 SPDT DLPDU
Table 49 – Primitives exchanged between DLSuser and DLEs to receive a DT DLPDU
58 Figure 18 – SPDT DLPDU structure
Table 50 – SPDT DLPDU Parameters
Table 51 – Primitive exchanged between DLSUser and DLEs to send an SPDT DLPDU
59 6.5 Network control messages
6.5.1 General
6.5.2 NCM_LA DLPDU
Figure 19 – NCM_LA DLPDU structure
Table 52 – Primitives exchanged between DLSuser and DLEs to receive an SPDT DLPDU
60 6.5.3 NCM_AT DLPDU
Table 53 – NCM_LA DLPDU parameters
61 Table 54 – NCM_AT DLPDU parameters
62 6.5.4 NCM_LS DLPDU
Table 55 – NCM_LS DLPDU parameters
63 6.5.5 NCM_RS DLPDU
Table 56 – NCM_RS DLPDU parameters
64 6.5.6 NCM_AR_DLPDU
6.5.7 NCM_AR DLPDU structure
Table 57 – NCM_AR DLPDU parameters
65 7 DLE elements of procedure
7.1 Overall structure
7.2 DLprotocol machine (DLPM)
7.2.1 Overview
7.2.2 Primitive definitions
Figure 20 – DLL structure and elements
66 Table 58 – Primitives exchanged between DLPM and DLSuser
67 Table 59 – Parameters exchanged between DLPM and DLSuser
68 Table 60 – Primitives exchanged between DLPM and DLM
69 7.2.3 DLPM state table
Figure 21 – State transition diagram of the DLPM
Table 61 – Parameters used with primitives exchanged between DLPM and DLM
70 Table 62 – DLPM state table
72 7.2.4 DLPM functions
73 Table 63 – DLPM functions table
74 7.3 DLL management Protocol
7.3.1 Overview
7.3.2 Primitive definitions
75 Table 64 – Primitives exchanged between DLM and DLSuser
76 Table 65 – Parameters used with primitives exchanged between DLM and DLSuser
Table 66 – Primitive exchanged between DLM and DMAC
77 7.3.3 DLM state table
Table 67 – Parameters used with primitives exchanged between DLM and DMAC
Table 68 – Primitive exchanged between DLM and DPHY
Table 69 – Parameters used with primitives exchanged between DLM and DPHY
78 Figure 22 – State transition diagram of DLM
79 Table 70 – DLM state table
101 7.3.4 DLM functions
Table 71 – DLM function table
110 8 Constants and error codes
8.1 General
8.2 Constants
111 Table 72 – DLL constants
112 8.3 Data-link layer error codes
Table 73 – Type 21 DLL error codes
113 Bibliography

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