OPTIONAL UNIT OF IMAGING APPARATUS, CONTROLLING METHOD OF OPTIONAL UNIT, AND IMAGING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide information useful at the time of service or maintenance. SOLUTION: The optional unit being coupled with an apparatus for forming an image on a recording medium and providing an additional function comprises a nonvolatile storage means 106 for detecting the fact that the optional unit is connected with a specified apparatus and brought into available state for the first time or the fact that service or maintenance is performed based on the connecting state of LINE1-3 or the state of a switch 107 and for storing its date information.