Image forming apparatus, detection method, and image forming system for detecting wireless tag

A detection method, which is used for an image forming apparatus provided with a communication interface that communicates with a wireless tag at a connection position where a sheet conveyance path is formed between the image forming apparatus and a retrofit device, the wireless tag disposed at the retrofit device, the method comprising:

• detecting a connection state between the retrofit device and the image forming apparatus in the sheet conveying path based on a communication result of the communication interface;
• providing a notification based on the connection state detected in the detection,
• wherein the wireless tag and the communication interface face each other at the connection position;
• and
• notifying of urging a re-installation of the retrofit device to the connection position in response to the connection state indicating that a non-connection is detected for a predetermined time or longer.

An image forming system comprising an image forming apparatus and a retrofit device provided with a wireless tag, the image forming apparatus comprising:

• a sheet conveying path formed between the image forming apparatus and the retrofit device placed at a connection position;
• a communication interface configured to communicate with the wireless tag disposed at the retrofit device;
• a detector configured to detect a connection state between the retrofit device and the image forming apparatus in the sheet conveying path based on a communication result of the communication interface;
• and
• a notification interface configured to give a notification based on the connection state detected by the detector,
• wherein the wireless tag and the communication interface face each other at the connection position,
• wherein the notification interface notifies of urging a re-installation of the retrofit device to the connection position in response to the connection state indicating that a non-connection is detected by the detector for a predetermined time or longer.