| 摘要 |
PURPOSE:To simplify the transmission control and to decrease the transmission time, by using BREAK signal as the transmission control code for open indication of data train, and solving conventional problems caused from the agreement between the control code and data. CONSTITUTION:In transmitting data from the main station to the slave station, the main station transmits a BREAK signal 46 as shown in A at the start of transmission data, and suceedingly, transmitted address 15, output command 47, and data 16 are sequentially transmitted. At the reception side (slave station), the BREAK signal 46 is received, and the BREAK signal detection interruption is given to the processor 25 for each slave station, the start of transmission data train is detected and the transmission processing is made open. Further, the reception interruption control circuit 43 is controlled and the output is taken as logic ''1'', and the address 15 is received at the processor 25 through the next reception end interruption from the reception end interruption generating circuit 33. |
