Large-scale PLC (Programmable logic Controller) system based on Xilinx Zynq technology

Abstract

The invention discloses a large-scale PLC (Programmable logic Controller) system based on a Xilinx Zynq technology. The large-scale PLC system comprises an FPGA (Field Programmable Gate Array) core circuit, a CPU (Central Processing Unit) core circuit, a DDR (Double Data Rate) memory, a Flash storage and an FIFO (First In First Out). The system adopts a double-core design of the FPGA core circuit and the CPU core circuit, two parallel processing units are subjected to on-chip interconnection through an AXI (Advanced eXtensible Interface) system bus, a hardware description language is used for dynamically and freely revising the logic structure of a hardware circuit, and an ARM (Advanced RISC Machines) processor is used for controlling the configuration work of an FPGA unit. A PCI (Peripheral Component Interconnect) Express root node controller is constructed in the FPGA unit to interact with a high-speed backboard IO (Input / Output) module. The input and the output of data and the implementation of a protocol are finished by the FPGA hardware unit, the working efficiency of the PLC system is effectively improved, the large-scale PLC system is flexible and convenient in operation, and the general operation level of the PLC system can be favorably improved.

Description

technical field [0001] The invention relates to a large-scale PLC system based on XilinxZynq technology. Background technique [0002] With the rapid development and increasing popularity of electronic technology, computer technology, communication network control technology and industrial automation control technology, in the field of industrial control systems, the programmable logic controller (PLC), which was born in the 1960s, has become increasingly powerful. , has been developed from traditional stand-alone PLC control / network communication to networked large-scale PLC system, and the application requirements of large-scale PLC system with more than 10,000 points have appeared in the fields of rail transit, petrochemical and so on. [0003] With the development of PLC technology, the form and function of PLC have been greatly developed, from the relatively simple independent unit structure in the past to the current modular, networked and distributed control. The I / O...

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