| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a communication volume without influencing control over a system and to relieve restriction on a scale of the system to expand the scale. <P>SOLUTION: When responding to an input/output load information request from a remote monitoring device 1, an air conditioner does not return the input/output load state but returns short data only notifying of receiving the request on condition that a variation degree of object data is within a certain range from the last data transmission. Accordingly, concerning load information which is low in state variation, a return data volume is reduced when the data is requested, and a communication volume on a network 2 is reduced without influencing control over a system to relieve restriction on a scale of the system, and the scale can be expanded. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
