Wireless tag processing device configured to select from lists a parameter value to be used to communicate with a wireless tag

A method for controlling a wireless tag processing device having a wireless tag reader-writer configured to communicate with a wireless tag included in a sheet conveyed by the wireless tag processing device, the method comprising:

• acquiring a first set list parameter values and a second list of parameter values;
• repeating a process until the sheet reaches a predetermined position, the process including:
• transmitting a radio wave using each of the parameter values of the first list and acquiring a first intensity of a response wave received from the wireless tag for said each of the parameter values of the first list, and
• conveying the sheet by a predetermined distance;
• when at least one of the first intensities satisfies a first predetermined condition, select the parameter value of the first list corresponding to the highest first intensity as a parameter value to be used by the wireless tag reader-writer;
• when none of the first intensities satisfy the first predetermined condition, transmitting a radio wave using each of the parameter values of the second list and acquiring a second intensity of a response wave from the for each of the parameter values of the second list;
• and
• when at least one of the second intensities satisfies a second predetermined condition, select the parameter value of the second list corresponding to the highest second intensity as the parameter value to be used by the wireless tag reader-writer.

A wireless tag processing device, comprising:

• a storage device that stores a first list of parameter values and a second list of parameter values;
• a wireless tag reader-writer configured to communicate with a wireless tag;
• and
• a processor configured to:
• acquire the first and second lists from the storage device,
• control the wireless tag reader-writer to transmit a radio wave using the parameter values of the first list and acquire a first intensity of a response wave received from the wireless tag for each of the parameter values of the first list,
• when at least one of the first intensities satisfies a first predetermined condition, select the parameter value of the first list corresponding to the highest first intensity as a parameter value to be used by the wireless tag reader-writer,
• when none of the first intensities satisfy the first predetermined condition, control the wireless tag reader-writer to transmit a radio wave using each of the parameter values of the second list and acquire a second intensity of a response wave from the wireless tag for each of the parameter values of the second list, and
• when at least one of the second intensities satisfies a second predetermined condition, select the parameter value of the second list corresponding to the highest second intensity as the parameter value to be used by the wireless tag reader-writer.