| 摘要 |
<p>PURPOSE:To improve the reliability, by evaluating the reliability into three states as normal, unclear and failed states and controlling a load with the state respectively of result of operation, preceding state and predetermined fixed state. CONSTITUTION:A binary signal from switches and sensors is inputted to a logical control circuit 5 and reliability evaluation circuits 7 and 8. The circuits 7 and 8 evaluate the reliability into three states as normal, failed and intermediate, i.e. unclear states. A reliability operation circuit 9 performs the operation of reliability by using the reliability evaluation value of each input signal. If the result of operation is normal, a load 6 is controlled as the result of the operation by the circuit 5, if unclear, the load is kept into the preceding load control state, and if failed, the load 6 is controlled to a predetermined fixed state with a fixed value setter 11.</p> |
