基于RS-485的PLC与读码器的通讯系统研究

Research on communication system of RS-485 based on PLC

介绍了采用台达DVP系列PLC与康耐视DM300系列读码器的组成的控制系统,该系统在蒙牛生产线自动读取条码中得到成功运用。本文将说明系统的硬件组成和工作原理,并详细介绍控制系统中串行通讯程序的编制方法。

This paper designed the control system composed of the PLC of Delta DVP series and the code reader of Cognex DM300 series. This system has been successfully applied in the automatic reading of bar code in Mengniu production line. The hardware composition and working principle of the system were illustrated in this paper. In addition, the compiling method of serial communication program in control system was introduced particularly.