| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control system capable of synchronizing operations of a master unit and a slave unit by using an asynchronous type communication line for performing retransmission control. <P>SOLUTION: The control system includes a master unit 1 and slave units 2-1 to 2-M. The master unit 1 includes: an instruction data generation section for transmitting training signals to the slave units 2-1 to 2-M in a fixed cycle, and transmitting instruction data in an instruction data transmission cycle calculated on the basis of the fixed cycle with the transmission time of the last training signal as an origin; and an asynchronous type communication line processing section 4 for performing the retransmission control. The slave unit 2-1 includes an instruction operation section 7 for obtaining the cycle timing of a reference cycle on the basis of the reception interval of the training signals, determining the number of times of retransmission of the instruction data on the basis of the latest cycle timing and the reception timing of the instruction data, and executing an instruction operation according to the instruction data at operation timing obtained on the basis of the reception timing of the instruction data and the determined number of times of the retransmission. <P>COPYRIGHT: (C)2012,JPO&INPIT |
