| 摘要 |
An arrangement of a designation of a drive element number using mother boards interposed between an upper grade device and a plurality of drive elements includes a plurality of groups of drive elements, each of which drive elements has a specifically designated drive element number, an upper grade device for carrying out a signal communication through tag bus line cables with a selected drive element, and a plurality of mother boards interposed between the upper grade device and the plurality of drive elements, each of the mother boards corresponding to one of the plurality of groups of drive elements. The plurality of mother boards has a same potential level arrangement of connection pins for a drive element number designation in connecting portions.
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