| 摘要 |
The invention relates to a method and to an apparatus, which is adapted for carrying out the method, for single-channel bus coupling of safety-relevant processes. One object of the invention is to provide a new approach for the transition from multiple channels to a single channel for the safe bus coupling of safety-relevant processes. For this purpose, the invention proposes a method which is distinguished in that a data record which is relevant for the safety-critical process is processed via at least two redundant processing channels ( 1, 2 ), in particular on a protocol-specific basis, in accordance with identical laws for in each case one safe protocol ( 14, 24 ) and the redundant safety messages ( 14, 24 ) for single-channel bus coupling are joined together to form a common safe protocol, to be precise in that each of the processing channels ( 1, 2 ) accesses a common buffer register ( 30 ), with write authorization for each register location being allocated only once, in such a way that the common safe protocol is joined together in components by in each case writing in different components of the respective safety messages.
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