| 摘要 |
PURPOSE:To attain stable transmission/reception even when a transmission speed, the number of subsequent stations and connection distance are increased by detecting automatically the remotest subsequent station from a master station and allowing the said subsequent station to represent the subsequent station group and sent the transmission clock. CONSTITUTION:A control circuit section in subsequent stations S1-Sn have two input terminals SiGi, EXCKi and two output terminals SiGo, EXCKo, the input terminal SiGi is connected to the output terminal SiGo of the subsequent station via a cable, and the input terminal EXCKi is connected to the output terminal EXCKo of the subsequent station via a cable. An input signal of the input terminal SiGi is a signal to detect the location of the own station, the input signal at the remotest station Sn is logical 0 and the input signal to the other stations S1-Sn-1 is logical 1. Thus, whether or not the station is the remotest direction is judged automatically depending on the logical state of the input signal to the input terminal SiGi. |
