| 摘要 |
PURPOSE:To attain the efficient operations by reading the arithmetic results periodically out of an arithmetic CPU and deciding the propriety of those results with comparison of the prescribed codes and the correlation with the data received previously to carry out immediately the second calculation when an error is detected. CONSTITUTION:The data are supplied through a terminal 99 and stored 11. While an arithmetic start signal 991 is applied to a CPU control circuit 16 from an input terminal 990. The circuit 16 applies a start signal to an arithmetic CPU17 and also sends the data given from a data memory circuit 11 to the CPU17 via a data transmission circuit 13. Here the CPU17 fetches the data stored in a ROM18 or a RAM19 and performs calculations. The results of these calculations are read out to a reading circuit 14 to be stored 15 and also sent to a discriminating circuit 12. The circuit 12 compares those arithmetic results with prescribed codes stored in a code memory circuit 22 and decides the correlation with the data received previously for decision of propriety of said arithmetic results. If an error is detected, the calculation is carried out again via the circuit 11. |
