| 摘要 |
PURPOSE:To prevent the separation of a system due to momentary error and to cut off the system quickly at a permanent error, by deciding as a permanent error in the single system bus, only when twice or more errors are generated within a given time and by stopping the use of the bus. CONSTITUTION:A timer 23 starts the operation when an error detection signal 26 is on, and when the 2nd error detection signal 26 is detected within the timer set time, a timer set FF24 is set. This is decided as a permanent error in a single system bus and the use of the bus is stopped. Thus, the cut-off of the system by a momentary error is prevented and the system is quickly cut off at the permanent error. |
