Real-time control system and method

Abstract

The invention discloses a real-time control system and method. The real-time control system comprises first and second single chip computers (1, 3), a clock source (4) and an on-site programmable gate array device (2), wherein the on-site programmable gate array device (2) is composed of first and second dual-port RAM (Random Access Memory) modules (U1, U2) with two sides respectively connected with the first and the second single chip computers (1, 3) and a semaphore module (U3) with two sides respectively connected with the first and the second single chip computers (1, 3) and the clock source (4). The first and the second single chip computers (1, 3) are used for operating the programmable gate array device (2); the clock source (4) is used for providing clock pulses to the programmable gate array device (2); the first and the second dual-port RAM modules (U1, U2) are used for converting the width of a data bus from 8 bits into 16 bits; and the semaphore module (U3) is used for controlling the first and the second dual-port RAM modules (U1, U2) via semaphore signals. The real-time control system and method disclosed by the invention have the effects of matched bus width, high transmission rate, strong anti-interference performance and the like.

Description

Technical field [0001] The invention belongs to a control system and method, and particularly relates to a real-time control system and control method for industrial automatic control. The real-time control system includes a first single-chip microcomputer for communicating with external data, and a control device for internal function control. The second single-chip microcomputer and a clock source for providing clock pulses. Background technique [0002] In the prior art, the real-time industrial control system used in the fields of industrial automation such as coal, oil field, steelmaking, etc. is composed of a single-chip microcomputer plus a memory, analog / digital conversion unit and peripheral interfaces. Its defects are: due to a real-time control The system generally needs to complete tasks such as data acquisition, analog / digital conversion, analysis and calculation, digital / analog conversion, real-time process control, and display. Relying on a single chip to complete ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the real-time industrial control system used in industrial automation fields such as coal, oil fields, and steelmaking is composed of a single-chip microcomputer plus a memory, an analog / digital conversion unit, and a peripheral interface. The system generally needs to complete tasks such as data acquisition, analog / digital conversion, analysis and calculation, digital / analog conversion, real-time process control, and display. Relying on a single-chip microcomputer to complete these tasks will greatly prolong the control period of the system for the control object, thus making the system The work efficiency is reduced, and high-speed real-time control cannot be realized

The data bus with the same bit width is often used for dual CPU communication, but in the actual process, the communication problem of data bus width mismatch between the two CPUs is often encountered, and interface circuit design is required

For this reason, two bus drivers and dual-port RAM chip devices are generally used to implement bus expansion to solve the communication problem of data bus width mismatch. This method requires more peripheral devices and has a long bus transmission path. problems of communication stability and real-time

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