BS EN IEC 61158-6-21:2019

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Industrial communication networks. Fieldbus specifications – Application layer protocol specification. Type 21 elements

Published By	Publication Date	Number of Pages
BSI	2019	62

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Categories: 35.100.70 - Application layer, BSI

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Description

1.1 General

This part of IEC 61158 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the three-layer fieldbus reference model described in IEC 61158-1.

This International Standard contains material specific to the Type 21 communication protocol.

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PDF Pages	PDF Title
2	undefined
5	Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7	CONTENTS
11	FOREWORD
14	1 Scope 1.1 General 1.2 Overview 1.3 Specifications
15	1.4 Conformance 2 Normative references 3 Terms, definitions, symbols, abbreviations and conventions
16	3.1 Terms and definitions from other ISO/IEC standards 3.1.1 ISO/IEC 7498-1 terms 3.1.2 ISO/IEC 8822 terms 3.1.3 ISO/IEC 8824-1 terms 3.1.4 ISO/IEC 9545 terms 3.2 Other terms and definitions
22	3.3 Abbreviations and symbols
23	3.4 Conventions 3.4.1 General conventions 3.4.2 Convention for the encoding of reserved bits and octets 3.4.3 Conventions for the common coding of specific field octets
24	3.4.4 Conventions for APDU abstract syntax definitions 3.4.5 Conventions for APDU transfer syntax definitions Figures Figure 1 – Common structure of specific fields
25	3.4.6 Conventions for AE state machine definitions Tables Table 1 – Conventions used for AE state machine definitions
26	4 FAL syntax description 4.1 General 4.2 FAL-AR PDU abstract syntax 4.2.1 Top level definition 4.2.2 Confirmed send service 4.2.3 Unconfirmed send service 4.2.4 FalArHeader 4.2.5 InvokeID 4.2.6 ServiceType
27	4.3 Abstract syntax of PDU body 4.3.1 ConfirmedServiceRequest PDUs 4.3.2 ConfirmedServiceResponse PDUs 4.3.3 UnconfirmedServiceRequest PDUs 4.3.4 Error information
28	4.4 Protocol data units (PDUs) for application service elements (ASEs) 4.4.1 PDUs for Application process ASE Table 2 – Status code for the confirmed response primitive
30	4.4.2 PDUs for Service data object ASE
33	4.4.3 PDUs for Process data object ASE 5 Transfer Syntax 5.1 Overview of encoding
34	5.2 APDU header encoding 5.2.1 Encoding of FalArHeader field 5.2.2 Encoding of InvokeID Field 5.2.3 Encoding of Type field Figure 2 – APDU overview Table 3 – Encoding of FalArHeader field
35	5.3 APDU body encoding 5.3.1 General 5.4 Encoding of Data types 5.4.1 General description of data types and encoding rules 5.4.2 Transfer syntax for bit sequences Figure 3 – Type field Table 4 – Transfer Syntax for bit sequences
36	5.4.3 Encoding of a Boolean value 5.4.4 Encoding of an unsigned integer value 5.4.5 Encoding of a signed integer Table 5 – Transfer syntax for data type UNSIGNEDn
37	5.4.6 Encoding of a floating point value 5.4.7 Encoding of an octet string value Table 6 – Transfer syntax for data type INTEGERn
38	5.4.8 Encoding of a visible string value 5.4.9 Encoding of a Unicode string value 5.4.10 Encoding of a time of day value 5.4.11 Encoding of a Time Difference value Figure 4 – Encoding of Time of Day value
39	6 FAL protocol state machines Figure 5 – Encoding of Time Difference value
40	Figure 6 – Primitives exchanged between protocol machines
41	7 AP context state machine 8 FAL service protocol machine 8.1 General 8.2 Common parameters of the primitives 8.3 AP ASE protocol machine 8.3.1 Primitive definitions
42	Table 7 – Primitives exchanged between FAL-user and APAM
43	8.3.2 State machine Figure 7 – State transition diagram of APAM Table 8 – Parameters used with primitives exchanged FAL-user and APAM Table 9 – APAM state table – Sender transitions
44	Table 10 – APAM state table – Receiver transitions Table 11 – Functions used by the APAM
45	8.4 Service data object ASE protocol machine (SDOM) 8.4.1 Primitive definitions Table 12 – Primitives exchanged between FAL-user and SDOM
46	8.4.2 State machine Figure 8 – State transition diagram of SDOM Table 13 – Parameters used with primitives exchanged FAL-user and SDOM
47	Table 14 – SDOM state table – Sender transitions
48	Table 15 – SDOM state table – Receiver transitions Table 16 – Functions used by the SDOM
49	8.5 Process data object ASE protocol machine (PDOM) 8.5.1 Primitive definitions 8.5.2 State machine Figure 9 – State transition diagram of PDOM Table 17 – Primitives exchanged between FAL-user and PDOM Table 18 – Parameters used with primitives exchanged between FAL-user and PDOM
50	9 AR protocol machine 9.1 General Table 19 – PDOM state table – Sender transitions Table 20 – PDOM state table – Receiver transitions Table 21 – Functions used by the SDOM
51	9.2 Point-to-point user-triggered confirmed client/server AREP (PTC-AR) ARPM 9.2.1 PTC-AR Primitive definitions 9.2.2 DLL mapping of PTC-AREP class Table 22 – Primitives issued by user to PTC-ARPM Table 23 – Primitives issued by PTC-ARPM to user
52	9.2.3 PTC-ARPM state machine Figure 10 – State transition diagram of PTC-ARPM Table 24 – PTC-ARPM state table – sender transactions
53	9.3 Multipoint network-scheduled unconfirmed publisher/subscriber AREP (MSUAR) ARPM 9.3.1 MSUAR primitive definitions Table 25 – PTC-ARPM state table – receiver transactions Table 26 – Function BuildFAL-PDU Table 27 – Primitives issued by user to ARPM Table 28 – Primitives issued by ARPM to user
54	9.3.2 DLL mapping of MSU-AR class 9.3.3 MSU-ARPM state machine
55	Figure 11 – State transition diagram of MSU-ARPM Table 29 – MSU-ARPM state table – sender transactions Table 30 – MSU-ARPM state table – receiver transactions Table 31 – Function BuildFAL-PDU
56	9.4 Multipoint user-triggered unconfirmed publisher/subscriber AREP (MTUAR) ARPM 9.4.1 MTUAR primitive definitions 9.4.2 DLL mapping of MTU-AR class Table 32 – Primitives issued by user to ARPM Table 33 – Primitives issued by ARPM to user
57	9.4.3 MTU-ARPM state machine Figure 12 – State transition diagram of MTU-ARPM Table 34 – MTU-ARPM state table – sender transactions Table 35 – MTU-ARPM state table – receiver transactions
58	10 DLL mapping protocol machine 10.1 Primitive definitions 10.1.1 Primitives exchanged between DMPM and ARPM 10.1.2 Parameters of ARPM/DMPM primitives 10.1.3 Primitives exchanged between DLL and DMPM Table 36 – Function BuildFAL-PDU Table 37 – Primitives issued by ARPM to DMPM Table 38 – Primitives issued by DMPM to ARPM Table 39 – Primitives issued by DMPM to DLL Table 40 – Primitives issued by DLL to DMPM
59	10.1.4 Parameters of DMPM/DLL primitives 10.2 DMPM state machine 10.2.1 DMPM states 10.2.2 DMPM state table 10.2.3 Functions used by DMPM Figure 13 – State transition diagram of DMPM Table 41 – DMPM state table – sender transactions Table 42 – DMPM state table – receiver transactions
60	Bibliography

Additional information

Status	Definitive
Pages	62
Publication Date	2019-09-04
ISBN	978 0 539 05641 9
Standard Number	BS EN IEC 61158-6-21:2019
Title	Industrial communication networks. Fieldbus specifications – Application layer protocol specification. Type 21 elements
Identical National Standard Of	EN IEC 61158-6-21:2019, IEC 61158-6-21:2019
Replaces	BS EN 61158-6-21:2012
Descriptors	Data processing, Computer networks, Process control, CSMA/CD networks, Data transmission, Industrial, Local area networks, Data transfer, Real-time systems, Data circuit-terminating equipment, Automatic control systems
Publisher	BSI
Committee	GEL/65/3
ICS Codes	35.100.70 - Application layer

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