| 摘要 |
PURPOSE:To perform set value control and other control simultaneously by regarding a scanning signal as the discrimination signal of a control signal, and transmitting a selection signal as the decision signal of a set value. CONSTITUTION:An objective equipment is selected by the switch operation of a selecting means 3 at a master station and a set value for the selected equipment is set by a setter. Then, the selection signal is inputted to a parallel-serial converter 7a as the discrimination signal ''3'' of the set value together with output destination information on the set value, and an A/D converter 2 converts the set value into a digital signal. A scanning circuit 8a makes a scan by giving a discrimination signal ''0'' to the output of a fixed mark encoder 6a on the basis of the indication of the converter 7a, and then scans the output of the A/D converter 2. If a control means 5 is operated when the encoder 6a is scanned, the control signal is encoded into a fixed mark, which is inputted to the converter 7a. The converter 7a composes transmission frames of each of a synchronizing word F, fixed frame of the control signal having the added discrimination signal ''0'', and the set value having the added discrimination signal ''3'' with information as the selection signal from the respective input signals and the frames are modulated by a next modulator 9 and transmitted to a slave station. Thus, the set value control and other control are performed with the same frame, so there is no time delay when control other than the set value control should be performed simultaneously with the set value control, speeding up the response of the control. |
