Patent ID: 7843589

Claim:
An image forming system comprising: an image forming apparatus that accepts a print command from an external device and forms an image on a recording material according to the print command; and a user interface device connected to the image forming apparatus so as to be able to communicate with the image forming apparatus, the user interface device that accepts entry from a user, outputs the entry to the image forming apparatus and displays information based on data input from the image forming apparatus, wherein: power control and power supply are performed for the image forming apparatus and the user interface device separately, the image forming apparatus comprises: a detection section that detects as to whether or not communication between the image forming apparatus and the user information device is disconnected; a storage section that stores a mode of the image forming apparatus and a mode of the user interface device when the detection section detects that the communication is disconnected; a re-establishment section that re-establishes the disconnected communication between the image forming apparatus and the user interface device; and a mode control section that controls (i) a mode, after the re-establishing by the re-establishment section, of the image forming apparatus and (ii) a mode, after the re-establishing by the re-establishment section, of the user interface device based on the mode of the image forming apparatus and the mode of the user interface device, which are stored in the storage section.