| 摘要 |
PURPOSE:To check the input information having important meaning with high reliability, by diagnosing the input information through a duplicating input circuit part and an input/output image comparator part. CONSTITUTION:A duplicating input circuit part 12 duplicates an input terminal for the input information which is fetched with application of a device input contact 10 and compares the input information passed through each input terminal to decide the propriety of the input information. While an input/output image comparator part 14 compares the input information passed through the part 12 with the control output information to decide the propriety of the input information. When both parts 12 and 14 decide that the input information is correct, a gate 16 is opened to permit the transfer of the input information to another system. In such a way, the input information having important meaning is checked with high reliability. |
