BSI 19/30395305 DC:2019 Edition
$24.66
BS EN IEC 61784-3. Industrial communication networks. Profiles – Part 3. Functional safety fieldbuses. General rules and profile definitions
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 107 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 10 | FOREWORD |
| 13 | 0 Introduction 0.1 General |
| 15 | 0.2 Use of extended assessment methods in Edition 4 0.3 Patent declaration |
| 17 | 1 Scope 2 Normative references |
| 19 | 3 Terms, definitions, symbols, abbreviated terms and conventions 3.1 Terms and definitions |
| 26 | 3.2 Symbols and abbreviated terms 3.2.1 Abbreviated terms |
| 27 | 3.2.2 Symbols |
| 28 | 4 Conformance 5 Basics of safety-related fieldbus systems 5.1 Safety function decomposition |
| 29 | 5.2 Communication system 5.2.1 General 5.2.2 IEC 61158 fieldbuses |
| 30 | 5.2.3 Communication channel types 5.2.4 Safety function response time |
| 31 | 5.3 Communication errors 5.3.1 General 5.3.2 Corruption 5.3.3 Unintended repetition 5.3.4 Incorrect sequence |
| 32 | 5.3.5 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 |
| 33 | 5.4.4 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 5.4.9 Different data integrity assurance systems |
| 34 | 5.5 Typical relationships between errors and safety measures |
| 35 | 5.6 Communication phases 5.7 FSCP implementation aspects |
| 36 | 5.8 Models for estimation of the total residual error rate 5.8.1 Applicability 5.8.2 General models for black channel communications |
| 37 | 5.8.3 Identification of generic safety properties |
| 38 | 5.8.4 Assumptions for residual error rate calculations 5.8.5 Residual error rates 5.8.5.1 Explicit and implicit mechanisms |
| 39 | 5.8.5.2 Residual error rate calculations 5.8.5.2.1 General 5.8.5.2.2 Contribution of data integrity errors (RRI) 5.8.5.2.3 Contribution of authenticity errors (RRA) 5.8.5.2.4 Contribution of timeliness errors (RRT) |
| 40 | 5.8.5.2.5 Contribution of masquerade errors (RRM) 5.8.6 Data integrity 5.8.6.1 Probabilistic considerations |
| 41 | 5.8.6.2 Deterministic considerations 5.8.6.3 Residual error probability for data integrity RPI 5.8.7 Authenticity 5.8.7.1 General |
| 43 | 5.8.7.2 Rate of occurrence of misdirected SPDUs (RA) |
| 44 | 5.8.8 Timeliness 5.8.8.1 General |
| 46 | 5.8.8.2 Rate of occurrence of incorrect sequence SPDUs (RT) |
| 47 | 5.8.9 Masquerade 5.8.9.1 General 5.8.9.2 Rate of occurrence for masqueraded SPDUs (RM) 5.8.10 Calculation of the total residual error rates 5.8.10.1 Based on the summation of the residual error rates |
| 48 | 5.8.10.2 Based on other quantitative proofs 5.8.11 Total residual error rate and SIL |
| 49 | 5.8.12 Configuration and parameterization for an FSCP 5.8.12.1 General |
| 51 | 5.8.12.2 Configuration and parameterization change rate 5.8.12.3 Residual error rate for configuration and parameterization 5.9 Relationship between functional safety and security 5.10 Boundary conditions and constraints 5.10.1 Electrical safety |
| 52 | 5.10.2 Electromagnetic compatibility (EMC) 5.11 Installation guidelines 5.12 Safety manual 5.13 Safety policy |
| 53 | 6 Communication Profile Family 1 (Foundation™ Fieldbus) – Profiles for functional safety 7 Communication Profile Family 2 (CIP™) and Family 16 (SERCOS®) – Profiles for functional safety |
| 54 | 8 Communication Profile Family 3 (PROFIBUS™, PROFINET™) – Profiles for functional safety 9 Communication Profile Family 6 (INTERBUS®) – Profiles for functional safety |
| 55 | 10 Communication Profile Family 8 (CC-Link™) – Profiles for functional safety 10.1 Functional Safety Communication Profile 8/1 10.2 Functional Safety Communication Profile 8/2 11 Communication Profile Family 12 (EtherCAT™) – Profiles for functional safety |
| 56 | 12 Communication Profile Family 13 (Ethernet POWERLINK™) – Profiles for functional safety 13 Communication Profile Family 14 (EPA®) – Profiles for functional safety 14 Communication Profile Family 17 (RAPIEnet™) – Profiles for functional safety |
| 57 | 15 Communication Profile Family 18 (SafetyNET p™ Fieldbus) – Profiles for functional safety |
| 58 | Annex 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) |
| 59 | A.4 Model C (redundant messages, FALs and SCLs, single channel) A.5 Model D (redundant messages and SCLs, single channel and FAL) |
| 61 | Annex B (normative) Safety communication channel model using CRC-based error checking B.1 Overview B.2 Channel model for calculations |
| 62 | B.3 Bit error probability Pe |
| 63 | B.4 Cyclic redundancy checking B.4.1 General |
| 64 | B.4.2 Requirements for methods to calculate RCRC |
| 66 | Annex C (informative) Structure of technology-specific parts |
| 69 | Annex 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 |
| 70 | D.3 Data integrity considerations for white channel approaches D.3.1 General D.3.2 Models B and C |
| 71 | D.3.3 Models A and D D.4 Verification of safety measures D.4.1 General |
| 72 | 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 D.4.7 Combination of measures |
| 73 | D.4.8 Absence of interference D.4.9 Additional fault causes (white channel) D.4.10 Reference test beds and operational conditions |
| 74 | D.4.11 Conformance tester |
| 75 | Annex 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 |
| 76 | E.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 |
| 77 | E.6 Model with split explicit and implicit safety measures |
| 78 | E.7 Model with completely implicit safety measures E.8 Addition to Annex B – impact of implicit codes on properness |
| 79 | Annex F (informative) Legacy models for estimation of the total residual error rate F.1 General F.2 Calculation of the residual error rate |
| 81 | F.3 Total residual error rate and SIL |
| 82 | Annex G (informative) Implicit data safety mechanisms for IEC 617843 functional safety communication profiles (FSCPs) G.1 Overview G.2 Basic principles |
| 83 | G.3 Problem statement: constant values for implicit data |
| 86 | G.4 RP for FSCPs with random, uniformly distributed errimpl G.4.1 General |
| 87 | G.4.2 Uniform distribution within the interval [0;2i-1], i ≥ r |
| 89 | G.4.3 Uniform distribution in the interval [1;2r-1], i = r |
| 91 | G.5 General case G.6 Calculation of PID |
| 93 | Annex H (informative) Residual error probability for example CRC codes (tables for verification of calculation methods) H.1 Overview H.2 Example of a 32 bit CRC |
| 98 | H.3 Example of a 16 bit CRC |
| 102 | H.4 Conclusion |
| 104 | Annex I (informative) Communication channel model with uniformly distributed errors I.1 Overview I.2 Channel model for calculations |
| 106 | Bibliography |
