Industrial protocol mapping structure and method based on FPGA

Abstract

The invention relates to the field of control, in particular to an industrial protocol mapping structure and method based on a field programmable gate array (FPGA), the structure comprises a central processing unit (CPU) and an FPGA chip which are connected, the FPGA chip is provided with a mapping module, a mapping form module, a framing module and a clock reset module, and the clock reset module respectively controls and is connected with the mapping module, the mapping form module and the framing module. The framing module receives data from a serial port, completes protocol framing according to frame byte data received from the serial port and outputs a message frame to the mapping module, and the mapping module is connected with the mapping form module. According to the invention, the RS-232 interface and the RS-485 interface are adopted, so that large-scale networking of an industrial control system can be realized, and mutual communication of PLCs and instruments of different manufacturers can be realized; and an FPGA chip is adopted, so that the accuracy, the real-time performance and the reliability of data transmission are ensured.

Description

technical field [0001] The invention relates to the field of control, in particular to an FPGA-based industrial protocol mapping structure and method. Background technique [0002] FPGA (Field Programmable Gate Array, Field Programmable Gate Array) is a product of further development on the basis of programmable devices such as PAL, GAL, and CPLD. It emerged as a semi-custom circuit in the field of application-specific integrated circuits (ASIC), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of original editable device gates. [0003] A communication protocol, also known as a communication protocol, refers to an agreement between the communication parties to control data transmission. The agreement includes unified regulations on issues such as data format, synchronization method, transmission speed, transmission steps, error detection and correction methods, and control character definitions, which must...

AI Technical Summary

Problems solved by technology

[0004] The current industrial protocols are mainly interconnected through serial ports and field buses, and the transmission distance is limited; different instruments need to be used in industrial scenarios, and communication between instruments is limited due to different protocols; the execution of control information in the production process Accuracy requirements are getting higher and higher, and the accuracy and real-time performance of data transmission meet the precision requirements of microsecond level

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