F6706 control method is not only time-consuming, labour-intensive and very imperfect. Industrial automation control system development to today, with the continuous improvement of communication technology, to get rid of the traditional field control method as the main control method, the use of the host computer through the fieldbus communication to control the production line of a new model.

F6706 in the bus network system design, the first to determine the hardware design scheme, that is, the bus network system in the hardware environment equipment – multiple PCs and multiple PLCs, through the hardware circuit design in an orderly manner connected together, and then with some other necessary equipment to achieve resource sharing and distribution management.

The F6706 achieves resource sharing between multiple PCs and PLCs, and this design proposes a bus network design scheme with a single microcontroller as the control station. This bus network design consists of multiple PCs, an AT89C51 microcontroller, and the resource sharing of PLC through RS232 bus and bus adapter circuit.