| 摘要 |
<p>PURPOSE:To improve the efficiency of system control by estimating the time when a main power supply voltage reaches a minimum operation voltage while it drops, and discriminating whether processing being performed so far can be continued or not. CONSTITUTION:A power-source state detection block 11 detects whether the main power supply voltage VP of a control system is lower than a minimum operation power voltage VR and a decision block 12 decides that it is a 0, so that a normal processing block 13 performs normal operation. When the voltage VP drops down to the voltage VR, an estimation block 21 for process-available time estimates the process-available time in the process of the voltage drop, and a process-availability decision block 22 decides on whether processing operation for an unprocessed portion can be completed until the voltage reaches the voltage VR to generate a decision output 1 or 0, which is stored in a storage block 23. When the decision output is the 1, the process being performed by the block 13 is carried on until it is completed and when the 0, the process is interrupted. Once the voltage VP reaches the VR, the block 11 outputs a 1, and a fault processing block 14 performs irreducible basic sequence processing of demand.</p> |
