| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a program debugging system capable of debugging a program while intentionally holding a step at an active state or an inactive state in the programming of sequential function chart(SFC) language. SOLUTION: A program execution sequence is provided with a holding function capable of intentionally holding a step concerned at an active state independently of the success/failure of a transition transfer condition on a succeeding step (S11). The sequence is also provided with a disabling function for intentionally holding the succeeding step at an inactive state independently of the success/failure of the transition transfer condition (S12). The sequence is also provided with a function for displaying the elasped time of the active step by an on-line and displaying the time of the final active state of the step held at the inactive state at present (S13 to S15).</p> |
