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GB/T 20438.7-2017 PDF English

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GB/T 20438.7-2017: Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 7: Overview of techniques and measures
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GB/T 20438.7: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 20438.7-2017English1515 Add to Cart 0-9 seconds. Auto-delivery Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 7: Overview of techniques and measures Valid
GB/T 20438.7-2006EnglishRFQ ASK 5 days Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 7: Overview of techniques and measures Obsolete

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GB/T 20438.7-2017: Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 7: Overview of techniques and measures


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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.040 N 10 GB/T 20438.7-2017 / IEC 61508-7.2010 Replacing GB/T 20438.7-2006 Functional safety of electrical / electronic / programmable electronic safety-related systems - Part 7.Overview of techniques and measures (IEC 61508-7.2010, IDT) Issued on. DECEMBER 29, 2017 Implemented on. JULY 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 Introduction... 5 1 Scope... 8 2 Normative references... 9 3 Definitions and abbreviations... 10 Annex A (informative) Overview of techniques and measures for E/E/PE safety- related systems. control of random hardware failures (see GB/T 20438.2)... 11 Annex B (informative) Overview of techniques and measures for E/E/PE safety related systems. avoidance of systematic failures (see GB/T 20438.2 and GB/T 20438.3)... 33 Annex C (informative) Overview of techniques and measures for achieving software safety integrity (see GB/T 20438.3)... 69 Annex D (informative) A probabilistic approach to determining software safety integrity for pre-developed software... 138 Annex E (informative) Overview of techniques and measures for design of ASICs... 144 Annex F (informative) Definitions of properties of software lifecycle phases 163 Annex G (informative) Guidance for the development of safety-related object- oriented software... 169 Bibliography... 171 Index... 174

Foreword

GB/T 20438 "Functional safety of electrical/electronic/programmable electronic safety-related systems" consists of the following seven parts. - Part 1.General requirements; - Part 2.Requirements for electrical/electronic/programmable electronic safety-related systems; - Part 3.Software requirements; - Part 4.Definitions and abbreviations; - Part 5.Examples of methods for the determination of safety integrity levels; - Part 6.Guidelines on the application of GB/T 20438.2 and GB/T 20438.3; - Part 7.Overview of techniques and measures. This Part is Part 7 of GB/T 20438. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 20438.7-2006 "Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 7. Overview of techniques and measures". Compared with GB/T 20438.7-2006, the main technical changes in this Part are as follows. - add Overview of techniques and measures for design of ASICs (see Annex E); - add Definitions of properties of software lifecycle phases (see Annex F); - add Guidance for the development of safety-related object-oriented software (see Annex G). This Part uses translation method to identically adopt IEC 61508-7.2010 "Functional safety of electrical/electronic/programmable electronic safety- related systems - Part 7.Overview of techniques and measures". This Part was proposed by China Machinery Industry Federation. This Part shall be under the jurisdiction of National Technical Committee on National Industrial Process Measurement Control and Automation of Standardization Administration of China (SAC/TC 124). The drafting organizations of this Part. Mechanical Industry Instrument and Meter Comprehensive Technology and Economic Research Institute, Beijing Guodian Zhishen Control Technology Co., Ltd., Beijing Hollysys System Engineering Co., Ltd., Siemens (China) Co., Ltd., Shanghai Zhonghu Electronics Co., Ltd. Main drafters of this Part. Shi Xueling, Xiong Wenze, Tian Yucong, Yang Liu, Zhou Youzheng, Feng Xiaosheng, Luo An, Li Jia, Liu Xiaodong, Mei Hao, Fang Laihua, Xu Aidong, Ye Jun, Zuo Xin, Qian Datao. Version of standard substituted by this Part is. - GB/T 20438.7-2006.

1 Scope

Figure 1 shows the overall framework for GB/T 20438 and indicates the role that this Part plays in the achievement of functional safety for E/E/PE safety- related systems.

2 Normative references

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. GB/T 20438.4-2017, Functional safety of electrical/electronic/programmable electronic safety related systems - Part 4.Definitions and abbreviations (IEC 61508-4.2010, IDT)

3 Definitions and abbreviations

For the purposes of this document, the definitions and abbreviations given in GB/T 20438.4-2017 apply.

Annex A

(informative) Overview of techniques and measures for E/E/PE safety-related systems. control of random hardware failures (see GB/T 20438.2) Global objective. To control failures in electromechanical components.

Annex B

(informative) Overview of techniques and measures for E/E/PE safety related systems. avoidance of systematic failures (see GB/T 20438.2 and GB/T 20438.3)

Annex C

(informative) Overview of techniques and measures for achieving software safety integrity (see GB/T 20438.3)

Annex D

(informative) A probabilistic approach to determining software safety integrity for pre- developed software

Annex E

(informative) Overview of techniques and measures for design of ASICs NOTE. The overview of techniques and measures contained in this annex and referenced by GB/T 20438.2-2017.This annex should not be regarded as either complete or exhaustive.

Annex F

(informative) Definitions of properties of software lifecycle phases

Annex G

(informative) Guidance for the development of safety-related object-oriented software All of the recommendations of GB/T 20438 for software design apply to object- oriented software. Because the object-oriented approach presents information differently from procedural or functional approaches, the following list contains those recommendations that need specific consideration. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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