PAC (programmable automatic controller) real-time control system based on dual-core processor

Abstract

The invention relates to the technical field of PAC (programmable automatic controller) systems, in particular to a PAC real-time control system based on a dual-core processor. The PAC real-time control system comprises the dual-core processor based on an industrial PC (personal computer), a shared memory and I / O (input / output) equipment, wherein the dual-core processor comprises processor cores CPU0 and CPU1, a third-party application program in the CPU0 is connected with a human-machine interaction module, the human-machine interaction module in the CPU0 is connected with an inner core interface module, the inner core interface module in the CPU0 is respectively connected with a real-time inner core module and the shared memory, a real-time inner core module in the CPU1 is respectively connected with the shared memory and the I / O equipment, the CPU0 operates a Windows operating system and is in charge of human-machine interaction and network communication, and the CPU1 is enabled to operate PAC real-time inner core codes and be in charge of execution of user programs and control over the I / O equipment. The two cores of the dual-core processor are separated, and the two mutually independent CPU0 and CPU1 operate different system inner cores due to undertaking different tasks, so that the openness, the stability and the real-timeness of the system are ensured.

Description

technical field [0001] The invention relates to a dual-core processor-based PAC real-time control system, which belongs to the technical field of programmable automation controller PAC systems. Background technique [0002] In the field of industrial automation, programmable logic controller PLC is a digital operation electronic device specially designed for industrial environment applications. It stores operation instructions such as logic operation, arithmetic operation, sequence control, timing and counting in the memory. And control various types of machinery and production processes through digital or analog I / O interfaces. As industrial control systems increasingly pursue networking and intelligence, traditional PLC software and hardware systems are limited by their proprietary design drawbacks, and their interoperability and flexibility are poor, which cannot fully meet user needs. Therefore, PAC The concept came into being. As a system-level multi-functional contro...

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Problems solved by technology

[0003] There are two main methods to develop the PAC control system: one is the development plan based on the PLC platform. This kind of PAC is developed from the upgrade of the traditional PLC and has strong stability and real-time performance. However, most PLC manufacturers use the existing Adding Ethernet communication, motion control and advanced algorithms to the scanning architecture realizes new functions, which leads to a lack of openness and flexibility in the system; the other is a development solution based on an industrial PC platform, and this PAC is based on an industrial PC hardware platform And I / O equipment, running in the commercial operating system environment, is the mainstream solution for PAC design and development. Although this solution has strong openness and versatility, because the commercial operating system is not a real-time operating system, it cannot guarantee the PAC system stability and real-time

At present, there is no PAC control system with reasonable price and complete functions in the domestic market.

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