| 摘要 |
An image forming device (2) comprises a first connector (3) and a second connector (4) for connecting a printer engine (1) arranged therein, with a first external device (5) and a second external device (6); and a control un it (7) having an alternate operation mode in which the communications between t he first external device (5) and the second external device (6) through the fir st connector (3) and the second connector (4) are alternately performed in a predetermined cycle. The control unit (7) enables reception of a command and/or a print starting signal from one of the first and second external devices (5, 6) during communication with the external device, and rejects reception of the command and the print starting signal from the other extern al device. There is a predetermined period for which the reception of the comma nd and the print starting signal from the two external devices is rejected when the communication from one external device is changed to the other. |
