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Microcomputer-Based Protective Functions in Industrial Production Systems:Assessment Method

机译:工业生产系统中基于微机的保护功能:评估方法

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摘要

An assessment method to verify adequate safety of microprocessor-based protectivefunctions used in industrial production systems is presented. The assessment is divided into seven steps: identification, analysis on system level, functional testing, analysis below system level, testing below system level, environmental stress testing and testing of user faults. Safety requirements and verification methods for microprocessor-based protective functions are introduced both on system level and below system level. Detailed measures are presented in appendices. They shall be used in addition to the commonly used requirements for safety devices based on conventional electronics without microprocessors. The described assessment method makes it possible to verify adequate safety for a microprocessor-based device to be used in safety critical applications according to the European standards draft prEN954-1 category 4 or 2.

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