Multiplex device, robot, and method for switching connection of multiplex device

A robot comprising:

• a movable section;
• a position output section provided on the movable section and configured to output a position signal representing a position of the movable section;
• a movable side multiple device provided on the movable section;
• a communication cable connected to the movable side multiple device;
• a multiplex connecting section connected to the communication cable and configured to transmit the position signal outputted from the position signal output section via multiplex communication with the movable side multiplex device;
• an amplifier connecting section connected to the multiplex connecting device;
• a position signal output section amplifier connected to the amplifier connection section;
• a measuring device connecting section connected to the position signal measuring device;
• and
• a switching section configured to switch from a connection between the multiplex connecting section and the position signal output section amplifier, and a connection between the multiplex connecting section and the position signal measuring device in accordance with detection of a connection between the position signal measuring device and the measuring device connecting section.