A motor control device for controlling a motor , said motor control device comprising: a network communication section configured to communicate, via a communication network, with a master device , which is a host device with respect to the motor control device ; a feedback signal obtaining section configured to obtain, from a detection section configured to detect a predetermined physical quantity corresponding to an operating state of the motor , a feedback signal indicative of the predetermined physical quantity; and a setting communication section configured to receive communication mode information of the feedback signal obtaining section through another communication path different from the communication network, the feedback signal obtaining section including a reconfigurable device, the reconfigurable device including a programmable logic device (PLD) whose circuit configuration can be changed, the feedback signal obtaining section being capable of changing a communication mode of the feedback signal obtaining section by changing the circuit configuration of the PLD, the motor control device changing the circuit configuration of the PLD in accordance with the communication mode information in a case where the setting communication section receives the communication mode information, the detection section includes a second detection section configured to detect an electric current supplied from the motor control device to the motor ; the feedback signal includes a second feedback signal indicative of the electric current; and the feedback signal obtaining section includes a second feedback signal obtaining section configured to obtain the second feedback signal from the second detection section . a network communication section configured to communicate, via a communication network, with a master device , which is a host device with respect to the motor control device ; a feedback signal obtaining section configured to obtain, from a detection section configured to detect a predetermined physical quantity corresponding to an operating state of the motor , a feedback signal indicative of the predetermined physical quantity; and a setting communication section configured to receive communication mode information of the feedback signal obtaining section through another communication path different from the communication network, the feedback signal obtaining section including a reconfigurable device, the reconfigurable device including a programmable logic device (PLD) whose circuit configuration can be changed, the feedback signal obtaining section being capable of changing a communication mode of the feedback signal obtaining section by changing the circuit configuration of the PLD, the motor control device changing the circuit configuration of the PLD in accordance with the communication mode information in a case where the setting communication section receives the communication mode information, the detection section includes a second detection section configured to detect an electric current supplied from the motor control device to the motor ; the feedback signal includes a second feedback signal indicative of the electric current; and the feedback signal obtaining section includes a second feedback signal obtaining section configured to obtain the second feedback signal from the second detection section . <EOS>