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Safe bus technology moves on apace

机译:安全公交技术迅速发展

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The development of a safe, open bus system is one of the significant issues to arise within the area of safety technology in the last two years. A typical fieldbus arrangement would include a factory bus, plant bus and possibly a separate bus system for the sensor/actuator area. In principle, a similar bus system would also be of interest to the safety technology sector; after all, the requirements are similar. However, none of the established bus systems meet the requirements of a "safe" network. This is because of the requirements of the Machinery Regulations, in particular EN 292-1, EN 1050 and EN 954-1. EN 954-1 states that, to meet the requirements of category 4, "a single fault in the control system shall not lead to a loss of the safety function", and that "the single fault is detected at or before the next demand upon the safety function." If this is not possible, "an accumulation of faults shall not lead to a loss of the safety function." In other words, it must be possible to manage a variety of potential faults.
机译:在过去的两年中,安全,开放的总线系统的开发是安全技术领域出现的重要问题之一。典型的现场总线布置将包括工厂总线,工厂总线以及可能的用于传感器/执行器区域的单独总线系统。原则上,安全技术领域也将关注类似的公交系统。毕竟,要求是相似的。但是,没有一个已建立的总线系统满足“安全”网络的要求。这是因为《机械规范》的要求,特别是EN 292-1,EN 1050和EN 954-1。 EN 954-1指出,为了满足类别4的要求,“控制系统中的单个故障不会导致安全功能的丧失”,并且“在下次要求时或之前,必须检测到单个故障。安全功能。”如果这不可能,则“故障的累积不会导致安全功能的丧失”。换句话说,必须有可能管理各种潜在的故障。

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