search
HomeCommon ProblemWhat is the difference between HMI and PLC?

Difference: HMI (Human Machine Interface) is an intelligent operation control and display device; when the screen is touched, the resistance and voltage on the resistor network change and the touch position is calculated by the software. The PLC is a digital computing controller with a microprocessor for automatic control, which can load control instructions into the memory at any time for storage and execution.

What is the difference between HMI and PLC?

HMI

Human Machine Interface (HMI), also known as touch screen monitor, is a An intelligent operation control and display device. When the screen is touched, the resistance and voltage on the resistor network change and the touch position is calculated by the software.

Human-machine interface (HMI) is also called "human-machine interface". Its main function is to help people and computers establish connections and exchange information. The interface of input/output devices, these devices include keyboards , monitor, printer, mouse, etc.

PLC

Programmable Logic Controller (PLC), a digital computing controller with a microprocessor for automation control, can Control instructions are loaded into memory at any time for storage and execution.

PLC is composed of functional units such as CPU, instruction and data memory, input/output interface, power supply, and digital-to-analog conversion.

There are many communication methods between HMI and PLC, the most common of which are Ethernet and serial port.

What is the relationship between HMI and PLC?

They are actually "dead enemies". HMI is the "villain" and PLC is the "good old man".

Because the PLC painstakingly converts the information collected on-site [captured through on-site sensors and converted into signals identifiable by the PLC, such as 4~20mA current signals], to calculate the results.

HMI transmits all these data from the communication port of the PLC through the data cable [Ethernet or serial port data cable]. Also, the HMI has to command the PLC to do this and that.

In addition, the glamorous side is completely taken up by HMI [process control and display], and the PLC has to stay pitifully in a dark box [control cabinet] without seeing the light.

The above is the detailed content of What is the difference between HMI and PLC?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
deepseek web version official entrancedeepseek web version official entranceMar 12, 2025 pm 01:42 PM

The domestic AI dark horse DeepSeek has risen strongly, shocking the global AI industry! This Chinese artificial intelligence company, which has only been established for a year and a half, has won wide praise from global users for its free and open source mockups, DeepSeek-V3 and DeepSeek-R1. DeepSeek-R1 is now fully launched, with performance comparable to the official version of OpenAIo1! You can experience its powerful functions on the web page, APP and API interface. Download method: Supports iOS and Android systems, users can download it through the app store; the web version has also been officially opened! DeepSeek web version official entrance: ht

In-depth search deepseek official website entranceIn-depth search deepseek official website entranceMar 12, 2025 pm 01:33 PM

At the beginning of 2025, domestic AI "deepseek" made a stunning debut! This free and open source AI model has a performance comparable to the official version of OpenAI's o1, and has been fully launched on the web side, APP and API, supporting multi-terminal use of iOS, Android and web versions. In-depth search of deepseek official website and usage guide: official website address: https://www.deepseek.com/Using steps for web version: Click the link above to enter deepseek official website. Click the "Start Conversation" button on the homepage. For the first use, you need to log in with your mobile phone verification code. After logging in, you can enter the dialogue interface. deepseek is powerful, can write code, read file, and create code

How to solve the problem of busy servers for deepseekHow to solve the problem of busy servers for deepseekMar 12, 2025 pm 01:39 PM

DeepSeek: How to deal with the popular AI that is congested with servers? As a hot AI in 2025, DeepSeek is free and open source and has a performance comparable to the official version of OpenAIo1, which shows its popularity. However, high concurrency also brings the problem of server busyness. This article will analyze the reasons and provide coping strategies. DeepSeek web version entrance: https://www.deepseek.com/DeepSeek server busy reason: High concurrent access: DeepSeek's free and powerful features attract a large number of users to use at the same time, resulting in excessive server load. Cyber ​​Attack: It is reported that DeepSeek has an impact on the US financial industry.

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.