| 摘要 |
PURPOSE:To simplify the transmission among the fields by carrying out a direct multiplex transmission among the slave stations under the control of the transmission control device. CONSTITUTION:End office control circuit 28 in transmission control device 8 generates the scanning address signals in the fixed cycle longer than the multiplex signal transmission cycle among the end offices. Each end office is set under the transmission/reception state when a correspondence is secured between the scanning address signal and the address value of the end office. The input end office set under the transmission state transmits the multiplex signal to transmission line 3; and the output end office under the reception state performs the reception. |
