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PROCEDURE AND APPARATUS FOR SIGNAL TECHNICAL SAFETY TRANSFER SERIES DATA BETWEEN PRIOR TWO-CHANGE OPERATING SECURE COMPUTERS USING A DOUBLE-BUSING SYSTEM
PROCEDURE AND APPARATUS FOR SIGNAL TECHNICAL SAFETY TRANSFER SERIES DATA BETWEEN PRIOR TWO-CHANGE OPERATING SECURE COMPUTERS USING A DOUBLE-BUSING SYSTEM
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机译:使用双总线系统的两台以前的操作安全计算机之间的信号技术安全转移系列数据的过程和装置
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摘要
In normal operation, the two loop buses convey data in opposite directions in parallel and in a redundant manner, one channel of each computer being allotted respectively to one bus by means of active bus couplers. In the event of an anomaly the buses are interrupted cyclically in sections in order to locate the faults, and transverse connections are established with the other respective bus. After the defect has been located, the adjacent sections are transferred continuously to a single-loop structure without redundancy, the faulty section being separated. At the same time, for the control of the two buses, an active control station is planned which hierarchically manages the rights to access to the bus for the other bus sharers who have their own computer, and compares in a cross-manner by means of appropriate monitoring functions, the data circulating in one bus in relation to the transmission data in the other bus and vice-versa. Non-agreement reveals an anomaly which results in switching to the test mode, in which the control station cyclically calls up the sub-stations activated bus couplers grouped respectively in pairs in bus control units progressively effect breaks and transverse connections, until a non-agreement between the data emitted and data received inside the control station indicates the location of the fault, which leads to switching into the ''FAULT'' mode.
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