Method and device for achieving PLC controlling in FPGA platform

Abstract

The invention discloses a method and device for achieving PLC controlling in an FPGA platform. The method is converted into Verilog HDL programs through an ST2FP resolver, not only can input and output logic of a PLC be correctly achieved, but also the programs can run in the FPGA platform in parallel, therefore, the mode that a traditional PLC only can sequentially scan executive programs is fundamentally changed, the PLC program execution time is not related to the size of the programs but only related to the depending level of the programs, and the program execution efficiency of an FPGA-PLC is incomparable for the traditional PLC. According to the device, an IEC-61131-3 standard is applied to the FPGA-PLC, the defects that the traditional PLC is poor in closing property and compatibility are overcome, breaking of the monopoly situation of high-end PLC manufacturers is facilitated, the characteristic that the FPGA executes the programs in parallel is also facilitated, therefore, the FPGA-PLC can execute the PLC programs in parallel, and the real-time performance of the PLC is significantly improved; processing of the FPGA is the implementation process of pure hardware, and therefore the FPGA-PLC system has the very high stability.

Description

technical field [0001] The invention belongs to the technical field of microprocessor control, in particular to a method and device for realizing PLC control on an FPGA platform. Background technique [0002] Programmable logic controller PLC (Programmable Logic Controller) has been widely used in manufacturing systems for many years. After decades of development, traditional hard PLC has become a mature technology. It is used in industrial control with its high speed, high performance and high reliability. field has been widely used. However, the traditional hard PLC has great disadvantages: the products of manufacturers are incompatible with each other, lack of clear and consistent standards, and it is difficult to build an open hardware architecture; the programming methods of each manufacturer's products are very different, and the technology is more proprietary Strong, the staff must go through a long period of professional training to master the programming method of ...

AI Technical Summary

Problems solved by technology

[0003] For the shortcomings of the prior art, the present invention provides a method and device for realizing PLC control on an FPGA platform. The method overcomes the shortcoming of low real-time performance of soft PLC, and embeds an embedded PLC conforming to the IEC61131-3 standard on the FPGA platform. Improve the real-time and flexibility of PLC; this device utilizes the characteristics that FPGA can execute programs in parallel, so that FPGA-PLC can execute PLC programs serially and in parallel to greatly improve the real-time performance of PLC

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