Image forming apparatus with attachable/detachable duplex unit, control method therefor, and storage medium

摘要

An image forming apparatus which is capable of preventing printing from being performed with a duplex unit incompletely attached. The duplex unit is attachable to and detachable from the image forming apparatus. Execution of one-sided printing and double-sided printing by a printing unit is inhibited based on that a detection unit does not detect attachment of the duplex unit in a state where information to an effect that attachment of the duplex unit has been detected previously by the detection unit.

主权项

1. An image forming apparatus configured to perform one-sided printing without attaching a duplex unit and double-sided printing using the duplex unit, comprising:
a printing unit configured to print an image on a sheet; a detector configured to detect whether or not the duplex unit is attached, wherein information corresponding to a first detection that the duplex unit is attached is stored in a storage unit; and a controller configured to inhibit performing of one-sided printing by the printing unit based on the information stored in the storage unit and a current detection by the detector that the duplex unit is not attached.