PLC graduation design, how to display PLC graduation design

Application of PLC technology in elevator operation.

Abstract: The German Siemens S7-200 series programmable controller CPU226CN is used as the control core, an expansion module EM223CN is expanded, and the Siemens MM440CN inverter is used as the motor traction drive, and the automatic control of the elevator is realized through the output of the traction machine. The main functions of the elevator are:

Respond to internal and external call signals, automatically open and close doors, automatically level floors, automatically display car position (floor), etc. It adopts a new design concept and ideas, and has an important breakthrough in technology, that is, a plurality of input signals are input to the input terminal of the PLC through an OR gate, and the internal logic operation unit of the PLC will be used.

The signal is then screened out, which saves the IO port, thus greatly reducing the design cost of the hardware. The elevator has the characteristics of stable lifting, comfort, safe and reliable operation.

Keywords: elevator; plc；cpu226cn；MM440 elevator is a general term for elevators that run vertically (often referred to as elevators), escalators that run in the inclined direction, and moving walks that run in the inclined or horizontal direction. Elevators have become a widely used means of transportation in modern life, and the continuous pursuit of elevator safety, efficiency and comfort has promoted the progress of elevator technology.

At present, the method of replacing the microcomputer with the programmable controller (PLC) to realize the signal set control makes the elevator control system have the characteristics of high reliability, convenient and flexible program design, strong anti-interference ability, and stable operation. Therefore, all kinds of elevator control systems are widely implemented by programmable controllers.

I'll make you one when I'm free from Siemens.

How to display the PLC graduation project. In the early stage, PLC control electrical design is not only a technical problem, it includes logic design, implementation methods, electrical sail bending functions and other major parts, however, this technology has appeared more and more in contemporary mechanical industrial design, is there such a limitation in this technological revolution? Of course not, mechanical industrial design is not only a matter of technology, but also a thing.

Here we take PLC as an example to illustrate that PLC can be used in the design of control devices and motion parts, we need to explain the motion function of PLC control device or code car wheel runner motion device, but in real projects, this process is not very simple, and we also encounter such problems in real projects. When the PLC is delayed, we need to use a programming language to run the PLC. Example 1:

The movement of the actuator is mainly used for executive functions, such as: cabbage. Execution of functions for the purpose of implementing program commands.