Sequencer system and address setting method

An address setting method for a plurality of stages of extension bases in a multistage sequencer system, the multistage sequencer system including a fundamental base and the extension bases, the fundamental base being installed with a control unit, each of the extension bases being installed with a controlled unit, the fundamental base and the extension bases being serially connected, and the fundamental base being one end of the serial connection, wherein

• the address setting method comprises:
• generating, by the control unit, a HOP designation packet, number of HOPs being designated for the HOP designation packet;
• adding, by the control unit, an address setting command to the HOP designation packet;
• transmitting, by the control unit, to the fundamental base and the extension bases the HOP designation packet to which the address setting command has been added;
• subtracting, by the fundamental base and the extension bases, upon reception of the HOP designation packet with the number of HOPs being other than 0, the number of HOPs by one, and transferring the HOP designation packet to the extension base connected to a subsequent stage;
• and
• self-configuring, by the extension bases, upon reception of the HOP designation packet with the number of HOPs being 0, to an address designated in the address setting command added to the HOP designation packet.