| 摘要 |
PURPOSE:To easily detect a circuit having a fault by adding a mode instruction means and a transfer means to each data processing circuit and repeating a job where the working of the data processing circuit is stopped and the input data is outputted as it is for each circuit. CONSTITUTION:When a diagnosis mode is set at a mode instruction means 23 of a data processing circuit 21, a transfer means 22 sends the data inputted to the input side to the output side as it is without processing it. Then the data on a terminal J is checked after the diagnosis mode is reset. Thus the presence or absence of a fault of the circuit 21 can be decided. In case the data processing circuits 6-10 are connected in series, a transfer means 20 sends the data on the input side to the output side as it is if a diagnosis mode is set at a mode instruction means 15 of the circuit 10. Then the fault of the circuit 10 can be decided by checking the data on a terminal B after the diagnosis mode is reset. The presence or absence of faults can be decided in the same way also for the circuits 9-6. In such a way, a circuit having a fault can be easily detected by transmitting repetitively the input data to the output side as it is for each circuit. |
