| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To safely perform supervisory control even when the mounting functions do not matches between a supervisory control target device and a supervisory control device while suppressing, to the minimum, the changes to an instance for recognizing the contents of the supervisory control to a supervisory control target device which the software of the supervisory control device has, when a function is added. <P>SOLUTION: When a new function is added to a supervisory control target device 2, a supervisory control device 1 is configured so that an attribute usage flag that indicates whether or not the supervisory control device 1 supports the changes and an attribute effectiveness flag that indicates whether or not the supervisory control target device 2 supports the changes are added, as the information relating to the attributes that undergo the changes due to the addition of the new function, to a definition of an instance which the supervisory control device 1 retains; the supervisory control device 1 also includes a control unit 101 which, on the basis of the values of the added attribute usage flag and attribute effectiveness flag, determines whether or not the supervisory control target device 2 supports the new function and whether or not the supervisory control based on the new function is effective for the attributes undergoing the changes due to the addition of the new function. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
