Programmable logic controller control method

Abstract

The invention relates to a control method of a programmable logic controller. Including the method of programming and controlling the programmable logic controller with the national standard graphic symbols of electrical and instrumentation, quickly configuring the program in the paper version of the electrical drawing style by dragging and dropping the symbols in the built-in graphic symbol library of the device, and then uploading the completed configuration The graphic symbols correspond to the digital input and output ports of the programmable logic controller and the analog input and output ports, so as to realize the collection and control port actions. The invention enables electrical designers to configure and program design programs in the form of electrical drawings to realize the control of programmable logic controllers. The configuration programming is simple and intuitive, and can replace cumbersome programming such as ladder diagrams and statement tables currently used in automation engineering. The method reduces the time cost for the project, reduces the difficulty of construction technology for the engineering and technical personnel, and provides an intuitive and simple programming interface for modifying and adding ports for the later maintenance personnel.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a control method of a programmable logic controller. Background technique [0002] 1. The use of existing programmable logic controllers: [0003] At present, the programmable logic controllers on the market need to use professional programming software to write programs such as ladder diagrams, statement lists, and function blocks on the computer, and then download them to the programmable logic controller after compilation to realize the control of the equipment. [0004] 2. Disadvantages of existing control programmable logic controllers: [0005] 1. The design process is complicated: as mentioned above, the programmable logic controller currently used to realize circuit control needs to go through multiple departments and multiple design processes, and then the program is written by professional programmers, and finally downloaded to the system of the programmable logic cont...

AI Technical Summary

Problems solved by technology

[0005] 1. The design process is complicated: as mentioned above, the programmable logic controller currently used to realize circuit control needs to go through multiple departments and multiple design processes, and then the program is written by professional programmers, and finally downloaded to the system of the programmable logic controller , in order to realize the control of the equipment

[0006] 2. Expensive: In a centralized control automation project, the upper computer configuration equipment, programming equipment and lower computer control equipment have become necessary equipment, and the price of the two systems accounts for a considerable part of the cost of the entire project. proportion

[0007] 3. Difficulty in troubleshooting: For some large systems with many input and output points, if the equipment fails, the programming notes or the I / O table corresponding to the port are lost, it will cause considerable difficulties for maintenance personnel to troubleshoot. Skilled operation of automation program programming and configuration is a long process that requires long-term accumulation of experience. For automation personnel, it is not possible to master and operate existing programmable logic controllers overnight.

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