| 摘要 |
PURPOSE:To previously prevent the breakdown of a detecting system, by detecting a fault for interruption request of an input/output device and then isolating the faulty input/output device form the channel. CONSTITUTION:If the interruption request is consecutively given by the fault of an input/output device, the interruption process routine is continued also at the side of the channel CH to continuously transmit the interruption permission signal. As a result, a counter 5 exceeds immediately the set value of a setter to produce a fault signal. Thus an input data bus Bi is cut off to make it impossible to supply the interruption request to the side of the channel CH. At the same time, an alarm device 8 is actuated with the fault signal. |
