The Design And Exploiture Of Communication Module In Machinery Automation Control System

This paper introduces the research and exploiture of the communication module, taking the Machinery automation control system as a platform. The congtrol computer of the Machinery automation control system communicates by means of RS485 bus, and the performance computer of the Machinery automation control system communicates by means of CAN bus. The design and exploiture of the communication module of the Machinery automation control system completes the task which is the conversion of RS485 bus and optical communication and the conversion of optical communication and CAN bus, that is completing the design and exploiture RS485 bus converted to optical communication sub module and optical communication converted to CAN bus sub module.First, it introduces overall design of RS485 bus converted to optical communication sub module and optical communication converted to CAN bus sub module and describes their function. Their functional units are detailed described.Then, RS485 bus converted to optical communication sub module and optical communication converted to CAN bus sub module are researched from both software realization and hardware realization. The design principles and design ideas of the FPGA and its external circuits, RS485 interface circuits and optical transceiver circuits are researched in the hardware area of RS485 bus converted to optical communication sub module. The exploiture of FPGA based on QuartusII software, the transplantation of NIOS soft nuclear and the design of FPGA software function modules are designed in the software area of RS485 bus converted to optical communication sub module. The hardware design of the optical transceiver circuits , FPGA and its peripheral circuits, MCU circuits, and CAN interface circuits are researched in the hardware area of optical communication converted to CAN bus sub module. Besides the similarities and differences of the FPGA software function modules exploiture between RS485 bus converted to optical communication sub module and optical communication converted to CAN bus sub module, the C language development based on the AVR microcontroller and related work processes are described in detail in the software area of optical communication converted to CAN bus sub module.Finally, the system debugging method and system debugging process are expatiated, at the same time, the outcome of this design are showed. The upgrade of this system and improve of this system are prospected.