GB/T 28808-2021Railway applications - Communication, signaling and processing systems - Software for railway control and protection systems (English PDF)

GB/T 28808-2021 is the English-translated version of 轨道交通 通信、信号和处理系统 控制和防护系统软件.

GB/T 28808-2021 is the Chinese standard "Railway applications - Communication, signaling and processing systems - Software for railway control and protection systems".

Its scope clause reads: 1:1 This document specifies the process and technical requirements required for the development of software for programmable electronic systems used in rail traffic control and protection applications: beg: It applies to any field with implicit security: These systems may be implemented through the use of dedicated microprocessors, programmable logic controllers, distributed multiprocessor systems, large-scale centralized processor systems, or other architectures: 1:2 This document applies only to the software and the interaction between the software and the system in which the software is installed: 1:3 This document has nothing to do with software that has been identified as having no impact on safety, i:e: software failure will not affect any identified safety features: can: Due to the uncertainty in risk assessment and even hazard identification, the concept of SIL0 is introduced: For safety impact less than The software part of the SIL1 function shall at least meet the requirements of SIL0 of this document: 1:4 This document applies to all safety-related software used in rail traffic control and protection systems, including: a) application design; b) operating system; c) support tools; d) Firmware: Application programming includes high-level programming, low-level programming and special programming (such as: programmable logic controller ladder logic): 1:5 This document also addresses the use of existing software and tools: If you want to use this type of software, you must meet the requirements in 7:3:4:7 and 6:5:4:16 Specific requirements for existing software, and requirements for tools in 6:7: 1:6 Software developed according to any version of this document is deemed to comply with the provisions of this document and is not subject to the requirements for existing software: 1:7 This document considers the current situation of application design based on general-purpose software suitable for a variety of applications: The software generates executable software for the application after it is configured through data, algorithms, or both: Chapters 1 to 6 and 9 apply to both Generic software is also suitable for applying data or algorithms: Chapter 7 applies only to general-purpose software, and Chapter 8 applies only to application data or algorithms: 1:8 This document does not deal with commercial issues, which should be raised as an essential part of the contract: But in any business activity, careful consideration is required: Consider all the terms of this document: 1:9 This document is not retrospective and is mainly used for new development: For existing systems, a comprehensive application is only performed when major modifications are made: For small changes, only 9:2 needs to be applied: Evaluators need to analyze the evidence provided in the software documentation in order to confirm changes to the software Whether the determination of the scope and nature is sufficient: This document should be applied when upgrading or maintaining existing software:.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 172 pages — is available in the English PDF.

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