| 摘要 |
PURPOSE:To localize the influence of a fault by programming the logic which defines only the output point related to some input device as a fail position and operates normally all other processings when the fault of this input device is detected. CONSTITUTION:Operating states of input devices 2a-2n are always monitored; and if a fault occurs in some input device, the faulty input device is discriminated by a fault data processing part 5d, and detection data is transferred to a related output operation processing part 5e. The output point which the faulty input device is related to is operated in the related output operation processing part 5e, and information is sent to an operation processing part 5b so that only output data of this part 5e becomes the fail position; and by this processing, only data related to the fault out of output data becomes the fail position, and other processings are performed. |
