| 摘要 |
PROBLEM TO BE SOLVED: To confirm normality or abnormality of a collating circuit and a computing processing device and to prevent the occurrence of malfunction of an apparatus at a site by a method wherein even when each computing data of a double system computing processing device effect malfunction and are not brought into non-coincidence with each other, coincidence of computing data is collated. SOLUTION: During inspection of a collating circuit 3, a control part 9 temporarily suspends output of data to a general purpose I/F part 6 by the collating circuit 3. Further, data of memory 13 and a memory 14 are inputted to a collating circuit 3 by a command based on a control signal 18 from the control part 9. Since the data of the memories 13 and 14 are not equal to each other, if the collating circuit 3 performs normal operation, non-coincidence of collating data is detected and a CPU 1 and a CPU 2 are reset by means of a reset signal 4. When the CPU1 and the CPU 2 are reset, it is detected that the collating circuit 3 is normally operated. This constitution confirms normality or abnormality of the collating circuit and a computing processing device. |
