| 摘要 |
PURPOSE:To avoid such a case where a device is hung up owing to a retry enable fault by monitoring the regeneration of the retry-enable fault within a prescribed period of time and discontinuing the processing when said fault occurs again. CONSTITUTION:An error register group 14 which detected a retry enable fault is set while a timer is not working. Then the prescribed initial value is loaded to a timer logic 22, and a count-down action is started by a time counting clock 23. The fault is reported to a processing control part 13 via an AND circuit 26 in the form of a fault to which the retry is permitted since the timer output signal 24 is set at '0'. When a retry fault once occurs and the group 14 is set while the timer 22 is working, the signal 24 shows '1' and therefore an indication is given to the part 13 to discontinue the processing through an AND circuit 25. |
