| 摘要 |
PURPOSE:To improve the reliability of the titled switching system by adding a secondary switching logic part necessary for diagnosis to each switching logic part of the system for operation of the result of operation between both logic parts and diagnosing the result of said operation. CONSTITUTION:The duplex system of a control system consists of A and B system control parts, and the process control parts 1a and 1b of the A and B system control parts switch a duplex system switching part 6 for control of a controlled system 2. The error information on both A and B systems are detected by error processing parts 3a and 3b. Based on this result of detection, the switching logic is calculated by a switching logic part 5. Then a switching connection command is delivered to the part 6. At the same time, the secondary switching logic parts 8a and 8b of the A and B system control parts perform the diagnosis operation for switch control actions according to the error information. Then the diagnosis parts 9a and 9b of the A and B systems compare the results of operations among those logic parts 5, 8a and 8b. While the actions of the part 6 are diagnosed by both parts 9a and 9b. |
