IEC 61158-4-11:2007
(Main)Industrial communication networks - Fieldbus specifications - Part 4-11: Data-link layer protocol specification - Type 11 elements
Industrial communication networks - Fieldbus specifications - Part 4-11: Data-link layer protocol specification - Type 11 elements
It provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to all participating data-link entities in a synchronously-starting cyclic manner, according to a pre-established schedule, and in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities. Thus this protocol can be characterized as one which provides cyclic and acyclic access asynchronously but with a synchronous restart of each cycle. It includes the following significant changes with respect to the previous edition deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market relevance; addition of new types of fieldbuses; division of this part into multiple parts numbered.
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IEC 61158-4-11
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-11: Data-link layer protocol specification – Type 11 elements
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IEC 61158-4-11
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-11: Data-link layer protocol specification – Type 11 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XC
ICS 35.100.20; 25.040.40 ISBN 2-8318-9436-0
– 2 – 61158-4-11 © IEC:2007(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
1.1 General .8
1.2 Specifications.8
1.3 Procedures.8
1.4 Applicability.9
1.5 Conformance.9
2 Normative references .9
3 Terms, definitions, symbols and abbreviations.9
3.1 Reference model terms and definitions.9
3.2 Service convention terms and definitions.11
3.3 Terms and definitions .12
3.4 Symbols and abbreviations.16
4 Overview of the DL-protocol .17
4.1 General .17
4.2 Overview of the medium access control.17
4.3 Service assumed from the PhL .18
4.4 DLL architecture.19
4.5 Access control machine and schedule support functions .21
4.6 Local parameters, variable, counters, timers .22
5 General structure and encoding of PhIDUs and DLPDU and related elements of
procedure.32
5.1 Overview .32
5.2 PhIDU structure and encoding.32
5.3 Common MAC frame structure, encoding and elements of procedure .33
5.4 Elements of the MAC frame.34
5.5 Order of bit transmission .38
5.6 Invalid DLPDU.38
6 DLPDU-specific structure, encoding and elements of procedure .39
6.1 General .39
6.2 Synchronization DLPDU (SYN).39
6.3 Transmission complete DLPDU (CMP) .44
6.4 In-ring request DLPDU (REQ) .45
6.5 Claim DLPDU (CLM) .46
6.6 Command (COM) DLPDU.47
6.7 Cyclic data and cyclic data with transmission complete DLPDU (DT) and
(DT-CMP).48
6.8 RAS DLPDU (RAS) .49
7 DLE elements of procedure .50
7.1 Overall structure.50
7.2 Initialization.51
7.3 Cyclic transmission TX/RX control (CTRC) .52
7.4 Sporadic TX/RX control (STRC) .56
7.5 Access control machine (ACM).59
7.6 Redundancy medium control (RMC) .67
7.7 Serializer and deserializer .74
61158-4-11 © IEC:2007(E) – 3 –
7.8 DLL management protocol.74
Bibliography.80
Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses .13
Figure 2 – Basic principle of medium access control .18
Figure 3 – Interaction of PhS primitives to DLE.19
Figure 4 – Data-link layer internal architecture .21
Figure 5 – Common MAC frame format for DLPDUs.33
Figure 6 – Sporadic DLPDU format.34
Figure 7 – Structure of FC field.35
Figure 8 – Structure of SYN DLPDU.39
Figure 9 – Structure of CMP DLPDU .44
Figure 10 – Structure of the REQ DLPDU.45
Figure 11 – Structure of CLM DLPDU .46
Figure 12 – Structure of COM DLPDU.47
Figure 13 – Structure of DT DLPDU.48
Figure 14 – Structure of RAS DLPDU.49
Table 18 – RAS parameter : 3rd and 4th octets.49
Figure 15 – Overall structure of DLL .51
Figure 16 – DLE state transition.52
Figure 17 – State transition diagram of CTRC.54
Figure 18 – State transition diagram of STRC .57
Table 29 – Primitives exchanged between ACM and RMC .60
Figure 19 – State transition diagram of ACM.62
Figure 20 – State transition diagram of RMC sending and send arbitration .69
Figure 21 – State transition diagram of RMC receiving.72
Figure 22 – State transition diagram of DLM .77
Table 1 – Data-link layer components.20
Table 2 – Mandatory DLE-variables and permissible values.22
Table 3 – Observable variables and their value ranges .23
Table 4 – F-type: DLPDU type.35
Table 5 – FCS length, polynomials and constants .36
Table 6 – PN -parameter: 3rd octet .40
Table 7 – CW -parameters: 4th octet.40
Table 8 – PM parameter.40
Table 9 – RMSEL parameter .41
Table 10 – ST-parameter: 5th octet.41
Table 11 – Th-parameter: 6th, 7th and 8th octets.41
Table 12 – Tm-parameter: 9th and 10th octets .42
Table 13 – Ts-parameter: 11th and 12th octets.42
Table 14 – Tl-parameter: 13th and 14th octets .42
Table 15 – LL parameters: 15th to 46th octets .43
– 4 – 61158-4-11 © IEC:2007(E)
Table 16 – CLM parameter: 4th octet .46
Table 17 – DT parameter: 3rd and 4th octets .48
Table 18 – RAS parameter : 3rd and 4th octets.49
Table 19 – Primitives exchanged between DLS-user and CTRC.53
Table 20 – Primitives exchanged between CTRC and ACM.53
Table 21 – Parameters used with primitives exchanged between DLS-user and CTRC .54
Table 22 – CTRC state table.55
Table 23 – CTRC functions table .56
Table 24 – Primitives exchanged between DLS-user and STRC.56
Table 25 – Primitives exchanged between STRC and ACM.57
Table 26 – Parameters used with primitives exchanged between DLS
...
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