EN 61804-2:2007

Function blocks (FB) for process control - Part 2: Specification of FB concept

Is applicable to Function Blocks (FB) for process control and specifies the Electronic Device Description Language (EDDL), specifies FB by using the result of harmonization work as regards several elements. defines a subset of the requirements of EN 61804-1 (hereafter referred to as Part 1) only, while Part 1 describes requirements for a distributed system.

Funktionsbausteine für die Prozessautomation - Teil 2: Festlegung des Funktionsbausteinkonzepts

Blocs fonction pour les processus industriels - Partie 2: Spécification du concept de bloc fonction

Is applicable to Function Blocks (FB) for process control and specifies the Electronic Device Description Language (EDDL), specifies FB by using the result of harmonization work as regards several elements. defines a subset of the requirements of EN 61804-1 (hereafter referred to as Part 1) only, while Part 1 describes requirements for a distributed system.

Funkcijski bloki (FB) za nadzor procesov - 2. del: Specifikacije koncepta FB (IEC 61804-2:2006)

General Information

• Status: Withdrawn
• Publication Date: 04-Jun-2007
• Withdrawal Date: 30-Apr-2010
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65E - IEC_SC_65E
• Parallel Committee: IEC/SC 65C - IEC_SC_65C
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 14-Feb-2021
• Completion Date: 14-Feb-2021
• Ref Project: SIST EN 61804-2:2007 - Function blocks (FB) for process control -- Part 2: Specification of FB concept

Relations

• Replaces: EN 61804-2:2004 - Function Blocks (FB) for process control - Part 2: Specification of FB concept and Electronic Device Description Language (EDDL)
• Effective Date: 28-Jan-2023
• Replaced By: EN IEC 61804-2:2018 - Function blocks (FB) for process control and electronic device description language (EDDL) - Part 2: Specification of FB concept
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2007
1DGRPHãþD
SIST EN 61804-2:2004
Funkcijski bloki (FB) za nadzor procesov - 2. del: Specifikacije koncepta FB (IEC
61804-2:2006)
Function blocks (FB) for process control - Part 2: Specification of FB concept
Funktionsbausteine für die Prozessautomation - Teil 2: Festlegung des
Funktionsbausteinkonzepts
Blocs fonction pour les processus industriels - Partie 2: Spécification du concept de bloc
fonction
Ta slovenski standard je istoveten z: EN 61804-2:2007
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61804-2
NORME EUROPÉENNE
June 2007
EUROPÄISCHE NORM
ICS 25.040.40; 35.240.50 Partially supersedes EN 61804-2:2004

English version
Function blocks (FB) for process control -
Part 2: Specification of FB concept
(IEC 61804-2:2006)
Blocs fonction  Funktionsbausteine
pour les processus industriels - für die Prozessautomation -
Partie 2: Spécification du concept Teil 2: Festlegung
de bloc fonction des Funktionsbausteinkonzepts
(IEC 61804-2:2006)
(CEI 61804-2:2006)
This European Standard was approved by CENELEC on 2007-05-01. 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

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61804-2:2007 E
Foreword
The text of the International Standard IEC 61804-2:2006, prepared by SC 65C, Industrial networks, of
IEC TC 65, Industrial-process measurement and control, was submitted to the formal vote and was
approved by CENELEC as EN 61804-2 on 2007-05-01 without any modification.
This European Standard, together with EN 61804-3:2007, supersedes EN 61804-2:2004.
– transfer of the EDDL-specific clauses to EN 61804-3;
– the FB-specific subclauses 4.1 and 4.2 as well as Clauses 5, 6, 7 and 8 are unchanged.
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) 2008-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-05-01
The International Electrotechnical Commission (IEC) and CENELEC draw attention to the fact that it is
claimed that compliance with this document may involve the use of patents
U.S. Patent No. 5,333,114
U.S. Patent No. 5,485,400
U.S. Patent No. 5,825,664
U.S. Patent No. 5,909,368
U.S. Patent Pending No. 08/916,178
Australian Patent No. 638507
Canadian Patent No. 2,066,743
European Patent No. 0495001
Validated in:
UK – Patent No. 0495001
France – Patent No. 0495001
Germany – Patent No. 69032954.7
Netherlands – Patent No. 0495001
Japan Patent No. 3137643
The IEC and CENELEC take no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he is willing to negotiate licenses under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holder of this patent right is registered with IEC. Information may be
obtained from:
Fieldbus Foundation,
9390 Research Boulevard, Suite II-250,
Austin, Texas, USA 78759,
Attention: President.
- 3 - EN 61804-2:2007
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. IEC and CENELEC shall not be held responsible for
identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61804-2:2006 was approved by CENELEC as a European
Standard without any modification.
__________
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  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-351 1998 International Electrotechnical Vocabulary - -
(IEV) –
Part 351: Automatic control
1) 2)
IEC 60584-1 - Thermocouples – EN 60584-1 1995
Part 1: Reference tables
IEC 61131-3 2003 Programmable controllers – EN 61131-3 2003
Part 3: Programming languages
IEC 61158 Series Digital data communications for EN 61158 Series
measurement and control - Fieldbus for use
in industrial control systems
IEC 61499-1 2005 Function blocks – EN 61499-1 2005
Part 1: Architecture
IEC 61499-2 2005 Function blocks – EN 61499-2 2005
Part 2: Software tools requirements

IEC/TS 61804-1 2003 Function blocks (FB) for process control – - -
Part 1: Overview of system aspects

ISO/IEC 7498-1 1994 Information technology - Open systems EN ISO/IEC 7498-1 1995
interconnection - Basic reference model –
Part 1: The basic model
1)
ISO/IEC 9899 - Programming languages - C - -

1)
ISO/IEC 10646-1 - Information technology - Universal Multiple-- -
Octet Coded Character Set (UCS) –
Part 1: Architecture and Basic Multilingual
Plane
1)
Undated reference.
2)
Valid edition at date of issue.

INTERNATIONAL IEC
STANDARD 61804-2
Second edition
2006-09
Function blocks (FB) for process control –
Part 2:
Specification of FB concept
 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale XA
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61804-2  IEC:2006(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .7
3 Terms, definitions and abbreviated terms and acronyms.8
3.1 Terms and definitions .8
3.2 Abbreviated terms and acronyms .14
4 General Function Block (FB) definition and EDD model .14
4.1 Device structure (device model) .14
4.2 Block combinations .25
5 Detailed block definition .28
5.1 General .28
5.2 Application FBs .28
5.3 Component FBs .36
5.4 Technology Block .36
5.5 Device (Resource) Block .45
5.6 Algorithms common to all blocks .47
6 FB Environment.49
7 Mapping to System Management.49
8 Mapping to Communication .49
9 Conformance statement.51

Annex A (informative) Parameter description .52
Annex B (normative) IEC 61804 Conformance Declaration .58

Bibliography.59

Figure 1 – Position of the IEC 61804 series related to other standards and products .6
Figure 2 – FB structure is derived out of the process (P&ID view) .15
Figure 3 – FB structure may be distributed between devices.16
Figure 4 – IEC 61804 FBs can be implemented in different devices .17
Figure 5 – General components of devices .17
Figure 6 – Block types of IEC 61804 .18
Figure 7 – IEC 61804 block overview (graphical representation not normative) .19
Figure 8 – UML class diagram of the device model .22
Figure 9 – Measurement process signal flow.26
Figure 10 – Actuation process signal flow .26
Figure 11 – Application process signal flow.27
Figure 12 – Analog Input FB .28
Figure 13 – Analog Output FB.30
Figure 14 – Discrete input FB .31
Figure 15 – Discrete Output FB.32

61804-2  IEC:2006(E) – 3 –
Figure 16 – Calculation FB.34
Figure 17 – Control FB.35
Figure 18 – Temperature Technology Block .36
Figure 19 – Pressure Technology Block .39
Figure 20 – Modulating actuation technology block .41
Figure 21 – On/Off Actuation Technology Block .43
Figure 22 – Harel state chart .46
Figure 23 – Application structure of ISO OSI Reference Model .49
Figure 24 – Client/Server relationship in terms of OSI Reference Model .50
Figure 25 – Mapping of IEC 61804 FBs to APOs.50

Table 1 – References of model elements .21
Table 2 – Variables and parameter description template .24
Table 3 – Example of temperature sensors of Sensor_Type.37
Table 4 – Device status state table .45
Table 5 – Device status transition table .46
Table
...

SLOVENSKI STANDARD
01-december-2007
Nadomešča:
SIST EN 61804-2:2004
Funkcijski bloki (FB) za nadzor procesov - 2. del: Specifikacije koncepta FB (IEC
61804-2:2006)
Function blocks (FB) for process control -- Part 2: Specification of FB concept
Funktionsbausteine für die Prozessautomation -- Teil 2: Festlegung des
Funktionsbausteinkonzepts
Blocs fonction pour les processus industriels -- Partie 2: Spécification du concept de bloc
fonction
Ta slovenski standard je istoveten z: EN 61804-2:2007
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.060 Jeziki, ki se uporabljajo v Languages used in
informacijski tehniki in information technology
tehnologiji
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61804-2
NORME EUROPÉENNE
June 2007
EUROPÄISCHE NORM
ICS 25.040.40; 35.240.50 Partially supersedes EN 61804-2:2004

English version
Function blocks (FB) for process control -
Part 2: Specification of FB concept
(IEC 61804-2:2006)
Blocs fonction  Funktionsbausteine
pour les processus industriels - für die Prozessautomation -
Partie 2: Spécification du concept Teil 2: Festlegung
de bloc fonction des Funktionsbausteinkonzepts
(IEC 61804-2:2006)
(CEI 61804-2:2006)
This European Standard was approved by CENELEC on 2007-05-01. 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

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61804-2:2007 E
Foreword
The text of the International Standard IEC 61804-2:2006, prepared by SC 65C, Industrial networks, of
IEC TC 65, Industrial-process measurement and control, was submitted to the formal vote and was
approved by CENELEC as EN 61804-2 on 2007-05-01 without any modification.
This European Standard, together with EN 61804-3:2007, supersedes EN 61804-2:2004.
– transfer of the EDDL-specific clauses to EN 61804-3;
– the FB-specific subclauses 4.1 and 4.2 as well as Clauses 5, 6, 7 and 8 are unchanged.
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) 2008-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-05-01
The International Electrotechnical Commission (IEC) and CENELEC draw attention to the fact that it is
claimed that compliance with this document may involve the use of patents
U.S. Patent No. 5,333,114
U.S. Patent No. 5,485,400
U.S. Patent No. 5,825,664
U.S. Patent No. 5,909,368
U.S. Patent Pending No. 08/916,178
Australian Patent No. 638507
Canadian Patent No. 2,066,743
European Patent No. 0495001
Validated in:
UK – Patent No. 0495001
France – Patent No. 0495001
Germany – Patent No. 69032954.7
Netherlands – Patent No. 0495001
Japan Patent No. 3137643
The IEC and CENELEC take no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he is willing to negotiate licenses under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holder of this patent right is registered with IEC. Information may be
obtained from:
Fieldbus Foundation,
9390 Research Boulevard, Suite II-250,
Austin, Texas, USA 78759,
Attention: President.
- 3 - EN 61804-2:2007
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. IEC and CENELEC shall not be held responsible for
identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61804-2:2006 was approved by CENELEC as a European
Standard without any modification.
__________
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  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-351 1998 International Electrotechnical Vocabulary - -
(IEV) –
Part 351: Automatic control
1) 2)
IEC 60584-1 - Thermocouples – EN 60584-1 1995
Part 1: Reference tables
IEC 61131-3 2003 Programmable controllers – EN 61131-3 2003
Part 3: Programming languages
IEC 61158 Series Digital data communications for EN 61158 Series
measurement and control - Fieldbus for use
in industrial control systems
IEC 61499-1 2005 Function blocks – EN 61499-1 2005
Part 1: Architecture
IEC 61499-2 2005 Function blocks – EN 61499-2 2005
Part 2: Software tools requirements

IEC/TS 61804-1 2003 Function blocks (FB) for process control – - -
Part 1: Overview of system aspects

ISO/IEC 7498-1 1994 Information technology - Open systems EN ISO/IEC 7498-1 1995
interconnection - Basic reference model –
Part 1: The basic model
1)
ISO/IEC 9899 - Programming languages - C - -

1)
ISO/IEC 10646-1 - Information technology - Universal Multiple-- -
Octet Coded Character Set (UCS) –
Part 1: Architecture and Basic Multilingual
Plane
1)
Undated reference.
2)
Valid edition at date of issue.

INTERNATIONAL IEC
STANDARD 61804-2
Second edition
2006-09
Function blocks (FB) for process control –
Part 2:
Specification of FB concept
 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale XA
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61804-2  IEC:2006(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .7
3 Terms, definitions and abbreviated terms and acronyms.8
3.1 Terms and definitions .8
3.2 Abbreviated terms and acronyms .14
4 General Function Block (FB) definition and EDD model .14
4.1 Device structure (device model) .14
4.2 Block combinations .25
5 Detailed block definition .28
5.1 General .28
5.2 Application FBs .28
5.3 Component FBs .36
5.4 Technology Block .36
5.5 Device (Resource) Block .45
5.6 Algorithms common to all blocks .47
6 FB Environment.49
7 Mapping to System Management.49
8 Mapping to Communication .49
9 Conformance statement.51

Annex A (informative) Parameter description .52
Annex B (normative) IEC 61804 Conformance Declaration .58

Bibliography.59

Figure 1 – Position of the IEC 61804 series related to other standards and products .6
Figure 2 – FB structure is derived out of the process (P&ID view) .15
Figure 3 – FB structure may be distributed between devices.16
Figure 4 – IEC 61804 FBs can be implemented in different devices .17
Figure 5 – General components of devices .17
Figure 6 – Block types of IEC 61804 .18
Figure 7 – IEC 61804 block overview (graphical representation not normative) .19
Figure 8 – UML class diagram of the device model .22
Figure 9 – Measurement process signal flow.26
Figure 10 – Actuation process signal flow .26
Figure 11 – Application process signal flow.27
Figure 12 – Analog Input FB .28
Figure 13 – Analog Output FB.30
Figure 14 – Discrete input FB .31
Figure 15 – Discrete Output FB.32

61804-2  IEC:2006(E) – 3 –
Figure 16 – Calculation FB.34
Figure 17 – Control FB.35
Figure 18 – Temperature Technology Block .36
Figure 19 – Pressure Technology Block .39
Figure 20 – Modulating actuation technology block .41
Figure 21 – On/Off Actuation Technology Block .43
Figure 22 – Harel state chart .46
Figure 23 – Application structure of ISO OSI Reference Model .49
Figure 24 – Client/Server relationship in terms of OSI Reference Model .50
Figure 25 – Mapping of IEC 61804 FBs to APOs.50

Table 1 – References of model elements .21
Table 2 – Variables and parameter description template .24
Table 3 – Example of temper
...