| 摘要 |
PURPOSE:To plan to simplify constitution and reduce cost by enabling to transmit an indicating information or a measuring information utilizing empty pits for selective control words produced from a difference of necessary number of pit between the control information and the measuring or indicating information. CONSTITUTION:A numerical signal SW1-SW10 and a command signal SWC, SWO in a control post are encoded by an encoder 1 and sent out to a controlled post as a control information S1 through a parallel-series transducer 2-1, a modulator 3-1 and a transmitter 4-1, thereafter, said signal gives control signals DO-11, DO-12, DO-101 and DO-102 to respective control instrument through a series-parallel transducer 6-1 and a decoder 7 after demodulated in a demodulator 5-1. In such control unit, the control post is equipped with a digital input unit 14 and the controlled post is equipped with a digital output unit 15 respectively, and it is so constituted as to transmit an indicating information from the control post to the controlled post utilizing empty pits for selective control words. |
