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IEC 61158-4-2
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
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IEC 61158-4-2
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6772-1
– 2 – IEC 61158-4-2:2019 © IEC 2019
CONTENTS
FOREWORD . 15
INTRODUCTION . 17
1 Scope . 19
1.1 General . 19
1.2 Specifications . 19
1.3 Procedures . 19
1.4 Applicability . 20
1.5 Conformance . 20
2 Normative references . 20
3 Terms, definitions, symbols, abbreviated terms and conventions . 22
3.1 Reference model terms and definitions . 22
3.2 Service convention terms and definitions . 24
3.3 Common terms and definitions . 24
3.4 Additional Type 2 definitions . 25
3.5 Type 2 symbols and abbreviated terms . 33
3.6 Conventions for station management objects . 34
4 Overview of the data-link protocol . 35
4.1 General . 35
4.1.1 DLL architecture . 35
4.1.2 Access control machine (ACM) and scheduling support functions . 36
4.1.3 Connection-mode, connectionless-mode data transfer and DL service . 37
4.2 Services provided by the DL . 37
4.2.1 Overview . 37
4.2.2 QoS . 37
4.3 Structure and definition of DL-addresses . 38
4.3.1 General . 38
4.3.2 MAC ID address . 38
4.3.3 Generic tag address . 39
4.3.4 Fixed tag address . 39
4.4 Services assumed from the PhL . 40
4.4.1 General requirements . 40
4.4.2 Data encoding rules . 41
4.4.3 DLL to PhL interface . 41
4.5 Functional classes . 43
5 General structure and encoding of PhIDUs and DLPDUs and related elements of
procedure . 43
5.1 Overview . 43
5.2 Media access procedure . 43
5.3 DLPDU structure and encoding . 47
5.3.1 General . 47
5.3.2 DLPDU components . 47
5.3.3 Preamble . 47
5.3.4 Start and end delimiters . 47
5.3.5 DLPDU octets and ordering . 47
5.3.6 Source MAC ID . 48
5.3.7 Lpackets field . 48
5.3.8 Frame check sequence (FCS). 48
5.3.9 Null DLPDU . 51
5.3.10 Abort DLPDU . 51
5.4 Lpacket components . 51
5.4.1 General Lpacket structure . 51
5.4.2 Size . 51
5.4.3 Control . 52
5.4.4 Generic tag Lpackets . 52
5.4.5 Fixed tag Lpackets . 53
5.5 DLPDU procedures . 53
5.5.1 General . 53
5.5.2 Sending scheduled DLPDUs . 54
5.5.3 Sending unscheduled DLPDUs . 54
5.5.4 Receiving DLPDUs . 54
5.6 Summary of DLL support services and objects . 54
6 Specific DLPDU structure, encoding and procedures . 56
6.1 Modeling language . 56
6.1.1 State machine description . 56
6.1.2 Use of DLL- prefix . 57
6.1.3 Data types . 57
6.2 DLS user services . 58
6.2.1 General . 58
6.2.2 Connected mode and connectionless mode transfer service . 58
6.2.3 Queue maintenance service . 60
6.2.4 Tag filter service . 60
6.2.5 Link synchronization service . 61
6.2.6 Synchronized parameter change service . 61
6.2.7 Event reports service . 62
6.2.8 Bad FCS service . 63
6.2.9 Current moderator service . 63
6.2.10 Power up and online services . 64
6.2.11 Enable moderator service . 64
6.2.12 Listen only service . 64
6.3 Generic tag Lpacket . 64
6.3.1 General . 64
6.3.2 Structure of the generic-tag Lpacket . 65
6.3.3 Sending and receiving the generic-tag Lpacket . 65
6.4 Moderator Lpacket . 65
6.4.1 General . 65
6.4.2 Structure of the moderator Lpacket . 65
6.4.3 Sending and receiving the moderator Lpacket . 66
6.5 Time distribution Lpacket . 67
6.5.1 General . 67
6.5.2 Structure of the time distribution Lpacket . 67
6.5.3 Sending and receiving the time distribution Lpacket . 69
6.6 UCMM Lpacket . 69
6.6.1 General . 69
6.6.2 Structure of the UCMM Lpacket . 69
6.6.3 Sending and receiving the UCMM Lpacket . 69
– 4 – IEC 61158-4-2:2019 © IEC 2019
6.7 Keeper UCMM Lpacket . 69
6.7.1 General .
...