| 摘要 |
PURPOSE:To simply obtain the fail-safe mechanism having high reliability against a single fault by providing a communication line for communicating mutually information from a detecting device and information related to a state of the detecting device between control circuits which necessitate detecting devices of the same function. CONSTITUTION:In the case a fault of detecting devices 6 - 9 is generated in one of control circuits 5, 14 to which the detecting devices 6 - 9 of the same function are connected, that is, in the case of a single fault, information related to a state (fault) of the detecting devices 6 - 9 is communicated from the control circuit 5 (14) to the other control circuit 14 (5) which is not faulty through a communication line 21 for communicating mutually between each control circuit 5, 14. The other control circuit 14 (5) which receives this information communicates normal information from the detecting devices 6 - 9 which are not faulty, connected to its controller 5 (14) to the control circuit 5 (14) in which the detecting device is faulty, and this control circuit 5 (14) in which the detecting device is faulty performs normally the prescribed control, based on this normal information. In such a way, the fail-safe mechanism having high reliability against a single fault is obtain by a multiple system of concise detecting devices 6 - 9. |
