A fpga-based industrial protocol mapping structure and method

Abstract

The present invention relates to the field of control, in particular to an FPGA-based industrial protocol mapping structure and method, the structure comprising: a connected central processing unit CPU and an FPGA chip, and the FPGA chip is provided with a mapping module, a mapping form module, a framing module and Clock reset module, the clock reset module respectively controls the connection mapping module, the mapping form module, and the framing module, and the framing module receives data from the serial port, and completes the framing of the protocol according to receiving frame byte data from the serial port, and outputs From the message frame to the mapping module, the mapping module is connected with the mapping form module. The present invention adopts RS-232 and RS-485 interfaces to realize large-scale networking of industrial control systems, and realizes mutual communication between PLCs and instruments of different manufacturers; adopts FPGA chips to ensure the accuracy, real-time and reliability of data transmission sex.

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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