{"id":244539,"date":"2024-10-19T16:04:03","date_gmt":"2024-10-19T16:04:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61784-32016\/"},"modified":"2024-10-25T11:03:21","modified_gmt":"2024-10-25T11:03:21","slug":"bs-en-61784-32016","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61784-32016\/","title":{"rendered":"BS EN 61784-3:2016"},"content":{"rendered":"

This part of the IEC 61784\u20113<\/span> series<\/span> explains some common principles that can be used in the transmission of safety-relevant messages among participants within a distributed network which use fieldbus technology in accordance with the requirements of IEC 61508<\/span> series<\/span> 1<\/sup> <\/span> for functional safety. These principles are based on the black channel approach. They can be used in various industrial applications such as process control, manufacturing automation and machinery.<\/p>\n

This part 2<\/sup> <\/span> and the IEC 61784\u20113\u2011x<\/span> <\/span>parts specify several functional safety communication profiles based on the communication profiles and protocol layers of the fieldbus technologies in IEC 61784\u20111<\/span> <\/span>, IEC 61784\u20112<\/span> <\/span> and the IEC 61158<\/span> <\/span> series. These functional safety communication profiles use the black channel approach, as defined in IEC 61508<\/span> <\/span>. These functional safety communication profiles are intended for implementation in safety devices exclusively.<\/p>\n

\n
\n NOTE 1\n <\/div>\n

Other safety-related communication systems meeting the requirements of IEC 61508<\/span> <\/span> series can exist that are not included in this standard.<\/p>\n<\/div>\n

\n
\n NOTE 2\n <\/div>\n

It does not cover electrical safety and intrinsic safety aspects. Electrical safety relates to hazards such as electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres.<\/p>\n<\/div>\n

All systems are exposed to unauthorized access at some point of their life cycle. Additional measures need to be considered in any safety-related application to protect fieldbus systems against unauthorized access. The IEC 62443<\/span> <\/span> series will address many of these issues; the relationship with the IEC 62443<\/span> <\/span> series is detailed in a dedicated subclause of this part.<\/p>\n

\n
\n NOTE 3\n <\/div>\n

Additional profile specific requirements for security can also be specified in IEC 61784\u20114<\/span> <\/span> 3<\/sup> <\/span>.<\/p>\n<\/div>\n

\n
\n NOTE 4\n <\/div>\n

Implementation of a functional safety communication profile according to this part in a device is not sufficient to qualify it as a safety device, as defined in IEC 61508<\/span> <\/span> series.<\/p>\n<\/div>\n

\n
\n NOTE 5\n <\/div>\n

The resulting SIL claim of a system depends on the implementation of the selected functional safety communication profile within this system.<\/p>\n<\/div>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nEuropean foreword
Endorsement notice <\/td>\n<\/tr>\n
6<\/td>\nAnnex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n
9<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
14<\/td>\nFOREWORD <\/td>\n<\/tr>\n
16<\/td>\n0 Introduction
0.1 General
Figures
Figure 1 \u2013 Relationships of IEC 61784-3 with other standards (machinery) <\/td>\n<\/tr>\n
17<\/td>\nFigure 2 \u2013 Relationships of IEC 61784-3 with other standards (process) <\/td>\n<\/tr>\n
18<\/td>\n0.2 Transition from Edition 2 to extended assessment methods in Edition 3
Figure\u00a03 \u2013 Transition from Edition 2 to Edition 3 assessment methods <\/td>\n<\/tr>\n
19<\/td>\n0.3 Patent declaration <\/td>\n<\/tr>\n
20<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
22<\/td>\n3 Terms, definitions, symbols, abbreviated terms and conventions
3.1 Terms and definitions <\/td>\n<\/tr>\n
29<\/td>\n3.2 Symbols and abbreviated terms <\/td>\n<\/tr>\n
30<\/td>\n4 Conformance
5 Basics of safety-related fieldbus systems
5.1 Safety function decomposition <\/td>\n<\/tr>\n
31<\/td>\n5.2 Communication system
5.2.1 General
5.2.2 IEC 61158 fieldbuses
Figure\u00a04 \u2013 Safety communication as a part of a safety function <\/td>\n<\/tr>\n
32<\/td>\n5.2.3 Communication channel types
5.2.4 Safety function response time
Figure\u00a05 \u2013 Example model of a functional safety communication system <\/td>\n<\/tr>\n
33<\/td>\n5.3 Communication errors
5.3.1 General
5.3.2 Corruption
5.3.3 Unintended repetition
5.3.4 Incorrect sequence
Figure\u00a06 \u2013 Example of safety function response time components <\/td>\n<\/tr>\n
34<\/td>\n5.3.5 Loss
5.3.6 Unacceptable delay
5.3.7 Insertion
5.3.8 Masquerade
5.3.9 Addressing
5.4 Deterministic remedial measures
5.4.1 General
5.4.2 Sequence number
5.4.3 Time stamp <\/td>\n<\/tr>\n
35<\/td>\n5.4.4 Time expectation
5.4.5 Connection authentication
5.4.6 Feedback message
5.4.7 Data integrity assurance
5.4.8 Redundancy with cross checking <\/td>\n<\/tr>\n
36<\/td>\n5.4.9 Different data integrity assurance systems
5.5 Typical relationships between errors and safety measures <\/td>\n<\/tr>\n
37<\/td>\n5.6 Communication phases
Tables
Table\u00a01 \u2013 Overview of the effectiveness ofthe various measures on the possible errors <\/td>\n<\/tr>\n
38<\/td>\n5.7 FSCP implementation aspects
5.8 Data integrity considerations
5.8.1 Calculation of the residual error rate
Figure\u00a07 \u2013 Conceptual FSCP protocol model
Figure\u00a08 \u2013 FSCP implementation aspects <\/td>\n<\/tr>\n
39<\/td>\nTable\u00a02 \u2013 Definition of items used for calculation of the residual error rates <\/td>\n<\/tr>\n
40<\/td>\n5.8.2 Total residual error rate and SIL
Figure\u00a09 \u2013 Example application 1 (m=4)
Figure\u00a010 \u2013 Example application 2 (m = 2) <\/td>\n<\/tr>\n
41<\/td>\n5.9 Relationship between functional safety and security
Table\u00a03 \u2013 Typical relationship of residual error rate to SIL
Table\u00a04 \u2013 Typical relationship of residual error on demand to SIL <\/td>\n<\/tr>\n
42<\/td>\n5.10 Boundary conditions and constraints
5.10.1 Electrical safety
5.10.2 Electromagnetic compatibility (EMC)
Figure\u00a011 \u2013 Zones and conduits concept for security according to IEC\u00a062443 <\/td>\n<\/tr>\n
43<\/td>\n5.11 Installation guidelines
5.12 Safety manual
5.13 Safety policy <\/td>\n<\/tr>\n
44<\/td>\n6 Communication Profile Family 1 (Foundation\u2122 Fieldbus) \u2013 Profiles for functional safety
7 Communication Profile Family 2 (CIP\u2122) and Family 16 (SERCOS\u00ae) \u2013 Profiles for functional safety
8 Communication Profile Family 3 (PROFIBUS\u2122, PROFINET\u2122) \u2013 Profiles for functional safety <\/td>\n<\/tr>\n
45<\/td>\n9 Communication Profile Family 6 (INTERBUS\u00ae) \u2013 Profiles for functional safety
10 Communication Profile Family 8 (CC-Link\u2122) \u2013 Profiles for functional safety
10.1 Functional Safety Communication Profile 8\/1
Table\u00a05 \u2013 Overview of profile identifier usable for FSCP\u00a06\/7 <\/td>\n<\/tr>\n
46<\/td>\n10.2 Functional Safety Communication Profile 8\/2
11 Communication Profile Family 12 (EtherCAT\u2122) \u2013 Profiles for functional safety <\/td>\n<\/tr>\n
47<\/td>\n12 Communication Profile Family 13 (Ethernet POWERLINK\u2122) \u2013 Profiles for functional safety
13 Communication Profile Family 14 (EPA\u00ae) \u2013 Profiles for functional safety
14 Communication Profile Family 17 (RAPIEnet\u2122) \u2013 Profiles for functional safety <\/td>\n<\/tr>\n
48<\/td>\n15 Communication Profile Family 18 (SafetyNET p\u2122 Fieldbus) \u2013 Profiles for functional safety <\/td>\n<\/tr>\n
49<\/td>\nAnnex A (informative) Example functional safety communication models
A.1 General
A.2 Model A (single message, channel and FAL, redundant SCLs)
A.3 Model B (full redundancy)
Figure\u00a0A.1 \u2013 Model A <\/td>\n<\/tr>\n
50<\/td>\nA.4 Model C (redundant messages, FALs and SCLs, single channel)
A.5 Model D (redundant messages and SCLs, single channel and FAL)
Figure\u00a0A.2 \u2013 Model B
Figure\u00a0A.3 \u2013 Model C <\/td>\n<\/tr>\n
51<\/td>\nFigure\u00a0A.4 \u2013 Model D <\/td>\n<\/tr>\n
52<\/td>\nAnnex B (normative) Safety communication channel model using CRC-based error checking
B.1 Overview
B.2 Channel model for calculations
Figure\u00a0B.1 \u2013 Communication channel with perturbation <\/td>\n<\/tr>\n
53<\/td>\nB.3 Bit error probability Pe
Figure\u00a0B.2 \u2013 Binary symmetric channel (BSC) <\/td>\n<\/tr>\n
54<\/td>\nB.4 Cyclic redundancy checking
B.4.1 General
Figure\u00a0B.3 \u2013 Example of a block with a message part and a CRC signature <\/td>\n<\/tr>\n
55<\/td>\nB.4.2 Considerations concerning CRC polynomials
Figure\u00a0B.4 \u2013 Block codes for error detection
Table\u00a0B.1 \u2013 Example dependency dmin and block bit length n <\/td>\n<\/tr>\n
56<\/td>\nFigure\u00a0B.5 \u2013 Proper and improper CRC polynomials <\/td>\n<\/tr>\n
57<\/td>\nAnnex C (informative) Structure of technology-specific parts
Table\u00a0C.1 \u2013 Common subclause structure for technology-specific parts <\/td>\n<\/tr>\n
59<\/td>\nAnnex D (informative) Assessment guideline
D.1 Overview
D.2 Channel types
D.2.1 General
D.2.2 Black channel
D.2.3 White channel <\/td>\n<\/tr>\n
60<\/td>\nD.3 Data integrity considerations for white channel approaches
D.3.1 General
D.3.2 Models B and C <\/td>\n<\/tr>\n
61<\/td>\nD.3.3 Models A and D
Figure\u00a0D.1 \u2013 Basic Markov model <\/td>\n<\/tr>\n
62<\/td>\nD.4 Verification of safety measures
D.4.1 General
D.4.2 Implementation
D.4.3 “De-energize to trip” principle
D.4.4 Safe state
D.4.5 Transmission errors
D.4.6 Safety reaction and response times <\/td>\n<\/tr>\n
63<\/td>\nD.4.7 Combination of measures
D.4.8 Absence of interference
D.4.9 Additional fault causes (white channel)
D.4.10 Reference test beds and operational conditions
D.4.11 Conformance tester <\/td>\n<\/tr>\n
64<\/td>\nAnnex E (informative) Examples of implicit vs. explicit FSCP safety measures
E.1 General
E.2 Example fieldbus message with safety PDUs
E.3 Model with completely explicit safety measures
Figure\u00a0E.1 \u2013 Example safety PDUs embedded in a fieldbus message
Figure\u00a0E.2 \u2013 Model with completely explicit safety measures <\/td>\n<\/tr>\n
65<\/td>\nE.4 Model with explicit A-code and implicit T-code safety measures
E.5 Model with explicit T-code and implicit A-code safety measures
Figure\u00a0E.3 \u2013 Model with explicit A-code and implicit T-code safety measures <\/td>\n<\/tr>\n
66<\/td>\nE.6 Model with split explicit and implicit safety measures
Figure\u00a0E.4 \u2013 Model with explicit T-code and implicit A-code safety measures
Figure\u00a0E.5 \u2013 Model with split explicit and implicit safety measures <\/td>\n<\/tr>\n
67<\/td>\nE.7 Model with completely implicit safety measures
E.8 Addition to Annex B \u2013 impact of implicit codes on properness
Figure\u00a0E.6 \u2013 Model with completely implicit safety measures <\/td>\n<\/tr>\n
68<\/td>\nAnnex F (informative) Extended models for estimation of the total residual error rate
F.1 Applicability
F.2 General models for black channel communications
Figure\u00a0F.1 \u2013 Black channel from an FSCP perspective <\/td>\n<\/tr>\n
69<\/td>\nF.3 Identification of generic safety properties
F.4 Assumptions for residual error rate calculations <\/td>\n<\/tr>\n
70<\/td>\nF.5 Residual error rates
F.5.1 Explicit and implicit mechanisms
F.5.2 Residual error rate calculations <\/td>\n<\/tr>\n
72<\/td>\nF.6 Data integrity
F.6.1 Probabilistic considerations
F.6.2 Deterministic considerations <\/td>\n<\/tr>\n
73<\/td>\nF.7 Authenticity
F.7.1 General
Figure\u00a0F.2 \u2013 Model for authentication considerations <\/td>\n<\/tr>\n
74<\/td>\nF.7.2 Residual error rate for authenticity (RRA)
Figure\u00a0F.3 \u2013 Fieldbus and internal address errors <\/td>\n<\/tr>\n
75<\/td>\nF.8 Timeliness
F.8.1 General <\/td>\n<\/tr>\n
76<\/td>\nFigure\u00a0F.4 \u2013 Example of slowly increasing message latency <\/td>\n<\/tr>\n
77<\/td>\nF.8.2 Residual error rate for timeliness (RRT)
Figure\u00a0F.5 \u2013 Example of an active network element failure <\/td>\n<\/tr>\n
78<\/td>\nF.9 Masquerade
F.9.1 General
F.9.2 Other terms used to calculate residual error rate for masquerade rejection (RRM)
F.10 Calculation of the total residual error rates
F.10.1 Based on the summation of the residual error rates <\/td>\n<\/tr>\n
79<\/td>\nF.10.2 Based on other quantitative proofs
F.11 Total residual error rate and SIL
Figure\u00a0F.6 \u2013 Example application 1 (m = 4)
Figure\u00a0F.7 \u2013 Example application 2 (m = 2) <\/td>\n<\/tr>\n
80<\/td>\nF.12 Configuration and parameterization for an FSCP
F.12.1 General
Table\u00a0F.1 \u2013 Typical relationship of residual error rate to SIL
Table\u00a0F.2 \u2013 Typical relationship of residual error on demand to SIL <\/td>\n<\/tr>\n
81<\/td>\nFigure\u00a0F.8 \u2013 Example of configuration and parameterization procedures for FSCP <\/td>\n<\/tr>\n
82<\/td>\nF.12.2 Configuration and parameterization change rate
F.12.3 Residual error rate for configuration and parameterization <\/td>\n<\/tr>\n
83<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Industrial communication networks. Profiles – Functional safety fieldbuses. General rules and profile definitions<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2016<\/td>\n86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":244545,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[385,2641],"product_tag":[],"class_list":{"0":"post-244539","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-25-040-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/244539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/244545"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=244539"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=244539"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=244539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}