| 摘要 |
<p>A device has an apparatus information holding units (7, 8) for holding apparatus information including operation screen information representing the functions and status of the device and used for constituting an operating screen of the device and apparatus configuration information representing the configuration of the device and version information generation managing units (9, 17, 18) for generating version information representing the change of information held in the apparatus information holding units (7, 8) and managing the version. When a controller issues a request to the device for notification, version information is included in the response of the device. The controller reads the apparatus information and version information from the device and detects a change in status of the inside of the device by referring to the version information. Thus, the controller can quickly and readily detect a change in status of the inside of the device, and it is ensured that the controller and device can share the same status information.</p> |
