(EN) In order to prevent the same identification data from being assigned to a plurality of active pens when pairing an active pen and a sensor controller, an active pen that is used in conjunction with asensor controller, and that includes an electrode and a processor connected to a memory. In response to a command signal (C) transmitted from the sensor controller the processor transmits a reply signal that includes identification data held in the memory (steps S18, S23), and on the basis of whether correspondence data corresponding to the identification data is included in a multi-uplink signal(M/U) received after transmission of the reply signal, the processor determines whether the sensor controller has not yet detected or has already detected the relevant active pen.
(ZH) 在主动笔与传感器控制器的配对中，防止对多支主动笔分配相同的识别数据。一种主动笔，与传感器控制器一起使用，其中，包括连接于电极及存储器的处理器。处理器作为向从传感器控制器发送出的指令信号(C)的响应而回复包括保存于存储器的识别数据的响应信号(步骤S18、S23)，基于在发送响应信号后接收到的多上行链路信号(M/U)中是否包含与上述识别数据对应的对应数据来判定传感器控制器是否未检测出该主动笔还是已检测出该主动笔。
