| 摘要 |
<p>PURPOSE:To attain simplicity and low cost by replacing a communication unit of a part not necessarily needing a response signal with a reception exclusive unit in simple configuration not provided with a transmission function. CONSTITUTION:Time division multiplex communication is applied by the bus system of contention control, branch points 23-25 are arranged on a bus 1 and multiple units 3, 4 for transmission/reception and a multiple unit 5 exclusive for reception are connected to the branch points 23-25. The multiple units 5, 4 are located nearly mutually. Since it is not required to return an acknowledge signal to the data transmission from the transmission/reception units 3, 4 for the reception exclusive unit 5, it is not required to provide the transmission function. Thus, the simple equipment and low-cost are attained.</p> |
