EN 61158-6-20:2008

Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements

It provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a 'window between corresponding application programs.' This standard provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 2 fieldbus. The term 'time-critical' is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life. It includes the following significant changes from the previous edition deletion of the former Type 6 fieldbus for lack of market relevance; addition of new types of fieldbuses; partition of part 6 of the third edition into multiple parts numbered.

Industrielle Kommunikationsnetze - Feldbusse - Teil 6-20: Protokollspezifikation des Application Layer (Anwendungsschicht) - Typ 20-Elemente

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-20: Spécification des protocoles des couches d'application - Eléments de type 20

Industrijska komunikacijska omrežja - Specifikacije za procesno vodilo - 6-20. del: Specifikacija protokola na aplikacijskem nivoju - Elementi tipa 20 (IEC 61158-6-20:2007)

General Information

• Status: Withdrawn
• Publication Date: 30-Mar-2008
• Withdrawal Date: 31-Jan-2011
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.70 - Application layer
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65C - IEC_SC_65C
• Parallel Committee: IEC/SC 65C - IEC_SC_65C
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 28-Mar-2015
• Completion Date: 28-Mar-2015
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 61158-6-20:2008 - Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements

Relations

• Replaces: EN 61158-6:2004 - Digital data communication for measurement and control - Fieldbus for use in industrial control systems - Part 6: Application layer protocol specification
• Effective Date: 29-Jan-2023
• Replaced By: EN 61158-6-20:2012 - Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2008
1DGRPHãþD
SIST EN 61158-6:2004
Industrijska komunikacijska omrežja - Specifikacije za procesno vodilo - 6-20. del:
Specifikacija protokola na aplikacijskem nivoju - Elementi tipa 20 (IEC 61158-6-
20:2007)
Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer
protocol specification - Type 20 elements
Industrielle Kommunikationsnetze - Feldbusse - Teil 6-20: Protokollspezifikation des
Application Layer (Anwendungsschicht) - Typ 20-Elemente
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-20:
Spécification des services des couches d'application - Eléments de type 20
Ta slovenski standard je istoveten z: EN 61158-6-20:2008
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.70 Uporabniški sloj Application layer
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61158-6-20
NORME EUROPÉENNE
March 2008
EUROPÄISCHE NORM
ICS 35.100.70; 25.040.40 Partially supersedes EN 61158-6:2004

English version
Industrial communication networks -
Fieldbus specifications -
Part 6-20: Application layer protocol specification -
Type 20 elements
(IEC 61158-6-20:2007)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 6-20: Spécification des services Teil 6-20: Protokollspezifikation
des couches d'application - des Application Layer
Eléments de type 20 (Anwendungsschicht) -
(CEI 61158-6-20:2007) Typ 20-Elemente
(IEC 61158-6-20:2007)
This European Standard was approved by CENELEC on 2008-02-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61158-6-20:2008 E
Foreword
The text of document 65C/476/FDIS, future edition 1 of IEC 61158-6-20, prepared by SC 65C, Industrial
networks, of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61158-6-20 on 2008-02-01.
This and the other parts of the EN 61158-6 series supersede EN 61158-6:2004.
With respect to EN 61158-6:2004 the following changes were made:
– deletion of Type 6 fieldbus for lack of market relevance;
– addition of new fieldbus types;
– partition into multiple parts numbered 6-2, 6-3, …6-20.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-02-01
NOTE  Use of some of the associated protocol types is restricted by their intellectual-property-right holders. In all cases, the
commitment to limited release of intellectual-property-rights made by the holders of those rights permits a particular data-link layer
protocol type to be used with physical layer and application layer protocols in type combinations as specified explicitly in the
EN 61784 series. Use of the various protocol types in other combinations may require permission from their respective
intellectual-property-right holders.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61158-6-20:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61784-1 NOTE  Harmonized as EN 61784-1:2008 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2:2008 (not modified).
__________
- 3 - EN 61158-6-20:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 60559 - Binary floating-point arithmetic for HD 592 S1 1991
microprocessor systems
1) 2)
IEC 61158-5-20 - Industrial communication networks - EN 61158-5-20 2008
Fieldbus specifications -
Part 5-20: Application layer service definition -
Type 20 elements
1) 2)
ISO/IEC 7498-1 - Information technology - Open Systems EN ISO/IEC 7498-1 1995
Interconnection - Basic Reference Model:
The Basic Model
1)
ISO/IEC 8824-2 - Information technology - Abstract Syntax - -
Notation One (ASN.1): Information object
specification
1)
ISO/IEC 8859-1 - Information technology - 8-bit single-byte - -
coded graphic character sets -
Part 1: Latin alphabet No.1
1)
ISO/IEC 9545 - Information technology - Open Systems - -
Interconnection - Application Layer structure

1)
Undated reference.
2)
Valid edition at date of issue.

IEC 61158-6-20
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-20: Application layer protocol specification – Type 20 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 35.100.70; 25.040.40 ISBN 2-8318-9500-6

– 2 – 61158-6-20 © IEC:2007(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
1.1 General .8
1.2 Specifications .8
1.3 Conformance.8
2 Normative references .9
3 Terms, definitions, symbols, abbreviations and conventions .10
3.1 Terms and definitions from other ISO/IEC standards .10
3.2 IEC/TR 61158-1 terms.10
3.3 Type 20 fieldbus application-layer specific definitions.13
3.4 Abbreviations and symbols .15
3.5 Conventions .16
3.6 Conventions used in state machines.16
4 Abstract syntax.17
5 Transfer syntax.17
5.1 General .17
5.2 Common APDU structure.18
5.3 Service-specific APDU structures .20
5.4 Data coding rules .35
6 Structure of FAL protocol state machines .40
7 AP-context state machines .41
8 FAL service protocol machine (FSPM) .41
8.1 General .41
8.2 FSPM state tables .42
8.3 Functions used by FSPM.47
8.4 Parameters of FSPM/ARPM primitives.47
9 Application relationship protocol machines (ARPMs) .48
9.1 AREP mapping to data link layer .48
9.2 Application relationship protocol machines (ARPMs) .49
9.3 AREP state machine primitive definitions.51
9.4 AREP state machine functions.51
10 DLL mapping protocol machine (DMPM) .51
10.1 DMPM states.51
10.2 DMPM state machines.52
10.3 Primitives exchanged between data link layer and DMPM.52
10.4 Functions used by DMPM .53
Bibliography.54

Figure 1 – APDU format.18
Figure 2 – Normal response from slave to master .18
Figure 3 – Command error response from slave to master .19
Figure 4 – Communication error response from slave to master .20
Figure 5 – Coding without identification.35
Figure 6 – Coding of Integer type data .35

61158-6-20 © IEC:2007(E) – 3 –
Figure 7 – Coding of Integer16 type data .36
Figure 8 – Coding of Unsigned type data .36
Figure 9 – Coding of Unsigned16 type data.36
Figure 10 – Coding of single precision Floating Point type data .36
Figure 11 – Coding of double precision Floating Point type data .37
Figure 12 – Coding of Date type data.37
Figure 13 – Relationships among protocol machines and adjacent layers .41
Figure 14 – State transition diagram of FSPM .42
Figure 15 – State transition diagram of the client ARPM .49
Figure 16 – State transition diagram of the server ARPM .50
Figure 17 – State transition diagram of DMPM .52

Table 1 – Conventions used for state machines .16
Table 2 – Response code values .19
Table 3 – Device status values .19
Table 4 – Response code values .20
Table 5 – Communication error codes.20
Table 6 – Identify request APDU .21
Table 7 – Identify response value field .22
Table 8 – Identify command specific response codes.
...