CHAPTER 2 BASIC OPERATION2-2 COPYRIGHT © 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Communication with the CopierThe operation modes selected on the copier are communicated to the machine in an IPCcommunication method. Likewise, the operation states of the machine are communicated to thecopier in an IPC communication.If an error occurs in the IPC communication, the copier’s self diagnosis function turns on toindicate “E400” or “E712” on its control panel.CommunicationICCommunicationICCPUCPURSOUTRSINCopier DADFFigure 2-102
