| 摘要 |
<P>PROBLEM TO BE SOLVED: To synchronize program versions of respective control devices without providing a control device program for a host device beforehand. <P>SOLUTION: A host device is connected with a plurality of control devices operated with own programs, respectively. From a first control device, the host device acquires a distribution file for program update that is generated based on an own program possessed by the first control device by distribution file acquisition means. When the distribution file is acquired by the distribution file acquisition means, the host device transmits an instruction of program update to a second control device which is different from the first control device. Then, in response to a distribution request from the second control device, the host device transmits the distribution file acquired by the distribution file acquisition means to the second control device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
