| 摘要 |
PURPOSE:To reduce the communication time and to attain efficient communication by substituting a repeater for a part of commands and responses transmitted and received between stations functioning as a talker and a listener. CONSTITUTION:Switching circuits SW1-SW6 of repeaters R1, R2 are connected to the 1st contact 1 at the start of data transmission and the transmission by a hand shake system is executed. In performing the data transmission of the 1st cycle, the switching circuits SW1-SW6 are changed over to the 2nd contact 2. A control circuit CT1 of the repeater R1 responds to the command signal transmitted from the station functioning as a talker in the 2nd cycle. Further, a control circuit CT2 of the repeater R2 transmits a command signal to the station functioning as the listener and receives a response signal from the station functioning as the listener. Thus, the transmittion and reception of the command and the response signal are not transmitted for a long section and only data D on a bus line is transmitted. |
