| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To simulate a user program including a function block with an external device monitor (EDM) function. <P>SOLUTION: A function is provided with a feedback condition storage means (a table) for associating an input tag, an output tag and delay time of the function block, and gives the feedback signal obtained by inverting the value of the output tag to the input tag, after the delay time elapsed from a value of the output tag is changed. This function is achieved by registering the value of the output tag in queues for each of sampling times (S72, S73), taking out the value of the queue exceeding prescribed the number of times corresponding to the delay time (S74), and giving the feedback signal, based on its taken-out value, to the input tag (S75). <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
