PURPOSE: To achieve executive control effectively, by discriminating whether the received instruction should be executed or not based on the position of a cut form medium when an instruction is given from a main body system device and reporting the rejection of instruction when the execution is judged impossible.

CONSTITUTION: When an instruction comes from a main body system device 18, a location of a cut form medium 7 is checked to discriminate if the instruction sequence is correct based on the position of the medium 7. As a result, if it is judged that the instruction sequence is not correct, the response is made to the rejection of instruction to the instruction received at present and the received instruction at present is not executed. If it is judged that the instruction sequence is correct, reception instruction at present is executed.