| 摘要 |
<p>A plurality of series-connected units, e.g., display units (U1-U4), are controlled by serial command data transmitted from a computer (1). The computer transmits ID setting command data for the respective units in a sequential manner. A controller (5) of each unit takes in an ID code included in a first-received ID setting command data to employ it as an ID code of the respective unit. Based on an instruction signal from the controller (5) indicating that the ID code has been set, subsequently received ID setting command data are transferred to the following unit by means of an AND gate (3). <IMAGE></p> |
