Identifying apparatus, apparatus to be identified, identifying method, and printing apparatus

A method for identifying a status of an apparatus to be identified, which outputs a response code obtained by encoding a predetermined identification code with a set logic and in which a predetermined first logic is set as the logic in an initial state, by means of an identifying apparatus comprising an input port through which a signal output from the apparatus to be identified is input, an output port through which a signal is output to the apparatus to be identified and a storage section to store a second logic different from the first logic, said method comprising:

• outputting the identification code through the output port;
• converting the identification code individually with the first logic and the second logic stored in the storage section to normal codes;
• individually collating the normal codes with the response code input through the input port;
• determining a logic determined in accordance with a predetermined rule as the second logic, and changing a logic for encoding in the apparatus to be identified to the second logic, in response to determination based on a collation result that the normal code obtained by encoding with the first logic coincides with the response code;
• causing the storage section to store the determined second logic;
• and
• identifying a status of the apparatus to be identified based on whether the response code coincides with either of the normal codes obtained by the encoding section and with which logic the normal code coincidence with the response code has been coded.

A printing apparatus for printing an image using a consumable independent of and detachably attached to the printing apparatus, the consumable outputting a response code obtained by encoding a predetermined identification code with a set logic and a predetermined first logic being set in the consumable as the logic in an unused status, said printing apparatus comprising:

• an input port through which a signal output from the consumable is input;
• an output port through which a signal is output to the consumable;
• a storage section to store a second logic different from the first logic;
• an identification code generating section which outputs the identification code through the output port;
• an encoding section which converts the identification code generated by the identification code generating section individually with the first logic and the second logic stored in the storage section to normal codes;
• a collating section which individually collates the normal codes obtained by the encoding section with the response code input through the input port;
• a change section which determines a logic determined in accordance with a predetermined rule as the second logic, and changes a logic for encoding in the consumable to the second logic, in response to determination based on the collation result that the normal code obtained by encoding with the first logic coincides with the response code;
• a storage control section which causes the storage section to store the second logic determined by the change section;
• and
• an identifying section which identifies a status of the consumable based on whether the response code coincides with either of the normal codes obtained by the encoding section and with which logic the normal code coincidence with the response code has been coded.