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IEC 61158-4-24
Edition 2.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-24: Data-link layer protocol specification – Type 24 elements
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IEC 61158-4-24
Edition 2.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-24: Data-link layer protocol specification – Type 24 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6779-0
– 2 – IEC 61158-4-24:2019 © IEC 2019
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
1.1 General . 10
1.2 Specifications . 10
1.3 Procedures . 10
1.4 Applicability . 11
1.5 Conformance . 11
2 Normative references . 11
3 Terms, definitions, symbols, abbreviations and conventions . 12
3.1 Reference model terms and definitions . 12
3.2 Service convention terms and definitions . 13
3.3 Common terms and definitions . 13
3.4 Symbols and abbreviations . 16
3.5 Additional Type 24 symbols and abbreviations . 17
3.6 Common Conventions . 17
3.7 Additional Type 24 conventions . 18
3.7.1 Primitive conventions . 18
3.7.2 State machine conventions . 18
4 Overview of DL-protocol . 19
4.1 Characteristic feature of the DL-protocol . 19
4.2 DL layer component . 20
4.2.1 Cyclic transmission control (CTC) . 21
4.2.2 Send Receive Control (SRC) . 21
4.2.3 DL-management . 21
4.3 Timing sequence. 21
4.3.1 Overview . 21
4.3.2 Cyclic transmission mode . 21
4.3.3 Acyclic transmission mode . 29
4.4 Service assumed from the PhL . 30
4.4.1 General requirement . 30
4.4.2 DL_Symbols . 30
4.4.3 Assumed primitives of the PhS . 30
4.5 Local parameters, variables, counters, timers . 30
4.5.1 Overview . 30
4.5.2 Variables, parameters, counters and timers to support DLE function . 31
5 DLPDU structure . 35
5.1 Overview . 35
5.1.1 Transfer syntax for bit sequences . 35
5.1.2 Data type encodings . 36
5.1.3 Frame format . 36
5.2 Basic format DLPDU structure . 36
5.2.1 General . 36
5.2.2 Synchronous frame . 40
5.2.3 Output data or Input data frame . 40
5.2.4 Delay measurement start frame . 41
5.2.5 Delay measurement frame . 41
5.2.6 Message token frame . 42
5.2.7 Status frame . 42
5.2.8 Cycle Information frame . 43
5.2.9 Message frame . 44
5.3 Short format DLPDU structure. 45
5.3.1 General . 45
5.3.2 Synchronous frame . 47
5.3.3 Output data or Input data frame . 48
5.3.4 Message frame . 49
6 DLE element procedure . 49
6.1 Overview . 49
6.2 Cyclic transmission control sublayer . 49
6.2.1 General . 49
6.2.2 DLS-user interface . 49
6.2.3 Protocol machines in CTC . 50
6.2.4 CTC-DLM interface . 101
6.3 Send Receive Control . 102
6.3.1 General . 102
6.3.2 SRC-CTC interface . 103
6.3.3 Detailed specification of SRC . 104
6.3.4 SRC-DLM interface . 108
7 DL-management layer (DLM) . 109
7.1 Overview . 109
7.2 Primitive definitions . 109
7.2.1 Primitives exchanged between DLMS-user and DLM . 109
7.2.2 Parameters used with DLM primitives . 110
7.3 DLM protocol machine . 110
7.3.1 C1 master . 110
7.3.2 Slave and C2 master . 115
7.4 Functions . 119
Bibliography . 122
Figure 1 – Data-link layer component . 21
Figure 2 – Timing chart of fixed-width time slot type cyclic communication . 22
Figure 3 – Timing chart of configurable time slot type cyclic communication . 24
Figure 4 – Schematic diagram of cyclic event occurrence . 26
Figure 5 – Timing relationship between cyclic transmission and data processing . 29
Figure 6 – Timing chart example of acyclic communication . 29
Figure 7 – Basic format DLPDU structure. 37
Figure 8 – Short format DLPDU structure . 45
Figure 9 – The state diagram of the C1 master for fixed-width time slot . 51
Figure 10 – The state diagram of the C2 master for fixed-width time slot . 58
Figure 11 – The state diagram of the slave for fixed-width time slot . 62
Figure 12 – The state diagram of the C1 master for configurable time slot . 65
Figure 13 – The state diagram of the C2 master for configurable time slot . 74
Figure 14 – The state diagram of slave for configurable time slot . 77
– 4 – IEC 61158-4-24:2019 © IEC 2019
Figure 15 – The state diagram of message initiator for basic format . 82
Figure 16 – The state diagram of message responder for basic format . 86
Figure 17 – The state diagram of message initiator for short format . 90
Figure 18 – The state diagram of message responder for short format . 94
Figure 19 – The
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