1. What is the difference between the human-machine interface and the "touch screen" that people often say?
Strictly speaking, the two are fundamentally different. Since the "touch screen" is only a hardware part that may be used in human-machine interface products, it is an input device installed at the front end of the display screen to replace the function of the mouse and keyboard. A human-machine interface product is a human-computer interaction device that includes hardware and software. In the industry, people often refer to human-machine interface products with touch input function as "touch screens", but this is unscientific.
2. What is the difference between human-machine interface and configuration software?
Human-machine interface products, often referred to as "touch screen", include HMI hardware and corresponding special screen configuration software, in general, HMI hardware of different manufacturers use different screen configuration software, and the main equipment variety is PLC. The configuration software is a general software product running on the PC hardware platform and the windows operating system, and can also form HMI products together with the PC or industrial computer; There are many kinds of equipment supported by the general configuration software, such as various PLCs, PC boards, appearances, inverters, modules and other equipment, and because the hardware platform of the PC is powerful (mainly reflected in the speed and storage capacity), the function of the general configuration software is also much stronger, and it is suitable for large-scale monitoring systems.
3. Is there an operating system in the HMI product?
Any human-machine interface product has a system software part, and the system software runs in the processor of the HMI to support multitasking functions, and the processor needs to have a small operating system to manage the operation of the management system software. In high-performance human-machine interface products based on tablet computers, general-purpose embedded operating systems such as WinCE and Linux are generally used.
4. Can the human-machine interface only be connected to the PLC?
That's not true. Human-computer interface products occur in order to solve the human-computer interaction problem of PLC, but with the development of computer skills and digital circuit skills, many industrial control equipment have serial port communication capabilities, so only industrial control equipment with serial communication capabilities, such as frequency converters, DC governors, temperature control surfaces, data acquisition modules, etc., can be connected to human-computer interface products to complete the human-computer interaction function.
5. Can the human-machine interface only be connected to other devices through the standard serial communication port?
Most of the time it is. However, with the development of computer and digital circuit skills, the interface of human-machine interface products can become stronger and stronger. In addition to the traditional serial (RS232, RS422/RS485) communication interfaces, some human-computer interface products already have network ports, parallel ports, USB ports and other data interfaces, which can be connected with industrial control equipment with network ports, parallel ports, USB ports and other interfaces to complete the human-computer interaction of the equipment.
6. Is there a communication function device that must be able to connect with the human-machine interface product?
That's how it should be. Because general human-machine interface products provide a large number of common device communication drivers that can be selected; In general, the communication connection between the HMI and the device can be completed by selecting the communication driver corresponding to the connecting device in the screen configuration software of the HMI. If there is no communication driver for the device to be connected in the configuration software of the selected HMI product, the user can inform the manufacturer of the HMI product of the communication port type and protocol content of the device to be connected, and ask the HMI manufacturer to compile the communication driver for the device on his behalf.
7. Can the PC and touch screen communicate directly with the PLC to complete the function of HMI?
Of course. However, it is necessary to compile the corresponding HMI software in order to make the PC a real HMI product.
8. What is the development trend of human-machine interface in the future?
With the development of digital circuits and computer skills, the distinction between high, medium and low functions of human-machine interface products in the future will become less and less obvious, and the functions of HMI will become more and more abundant; HMI products above 5.7 inches will all be color displays, and the life of the screen will be longer. Due to the reduction of computer hardware costs, HMI products will be based on tablet PC computers as high-end products of HMI hardware, because this high-end products have great advantages in processor speed, storage capacity, communication interface variety and quantity, networking ability, and software resource sharing, which is the future development direction of HMI products. Of course, small size (display size less than 5.7 inches) HMI products, due to their advantages in size and price, will be widely used in human-computer interaction applications of small mechanical equipment with the further enhancement of their functions (such as adding IO functions).
|
More on that
|
Lightning impulse control system requirements for industrial touch film screen - Hitech
1) The general requirements of the lightning impulse control system for the industrial touch film screen
1.1. Use the big button as a brief click interface;
1.2. Run your application in full screen;
1.3. Use bright scenery colors (don't use black);
1.4. Make the user touch ...
|
|
Frequently asked questions about HMIs
1. What is the difference between the human-machine interface and the "touch screen" that people often say?
In a strict sense, there is a fundamental difference between the two. Because the "touch screen" is only a hardware part that may be used in human-machine interface products, it is a kind of function that replaces the mouse and keyboard.
|
|
Analysis of the advantages and disadvantages of Hitec capacitive touch screen
The light transmittance and clarity of the capacitive contact screen are better than those of the four-wire resistive screen, and of course, it cannot be compared with the external acoustic wave screen and the five-wire resistive screen**.
The reflection of the capacitive screen is severe, and the transmittance of the four-layer composite contact screen of the capacitive skill to each wavelength of light is uneven, and there is a problem of color distortion, ...
|
|
PLC and touch screen connection method
When the contact screen is connected with the PLC, in fact, the memory of the PLC is used, (the contact screen also has a small amount of memory, which is only used to store system data, that is, the screen, controls, etc.), the contact screen and the PLC communication is generally a master/slave connection, that is, the contact screen reads the data from the PLC, and after making a judgment, it is displayed in the display ...
|
|
The principle and function of the touch screen - Hitech
function
For the convenience of operation, people use the touch screen instead of the mouse or keyboard, the touch screen is a smart device that can display and communicate with the PLC, and also has memory and programming capabilities. We can pass ...
|
|
Capacitive touch screen touch principle - Hitech
Capacitive touch screen provides you with a fast man-machine interface so that it can be used all over the world, and its capacitive touch screen with low power consumption, long service life and smooth operation performance is well received by the market, and various capacitive touch screen products emerge in endlessly. With the advancement of the process and mass production, the cost decreases, and gradually ...
|
|
Common faults of Hitec touch screen and their maintenance methods
(1) Fault 1: Contact deviation
Phenomenon 1: The direction of the finger does not coincide with the mouse arrow.
Reason 1: After installing the driver, there is no vertical contact with the bullseye when calibrating the alignment.
...
|
|
Precautions for man-machine interface touch screen all-in-one machine - Hitech
1. The touch screen part is a glass product, the glass corners are relatively sharp, and the assembly needs to be carried out with gloves/finger covers.
2. The touch screen part is a fragile glass product, and do not exert a strong impact on the touch screen during assembly.
3. Pick and place products ...
|
|
The internal composition of the touch screen - Hitec
The interior of the touch screen can be roughly divided into: communication interface unit, driver unit, memory variable unit, and display unit. In addition to the display unit, the other 3 units are invisible to us inside the touch screen.
1. Communication interface ...
|
|
Taiwan Hitech launched a new touch screen
Taiwan Hitec launched the new touch screen PWX8700T-N and PWX8A00T-N touch screens, which have the following features and applications:
The smartest design planning software
★Office-style editing interface
★ Rich 3D style pre...
|
|
Touchscreen alarm display settings
There are two recommended ways to set up the alarm display on the touch screen:
1. Place the alarm window in the template, so that when the alarm occurs, no matter which screen the alarm window is on, it will automatically pop up, so that the operator can obtain the alarm information.
...
|
|
Capacitive touch screen cable fault solved
Capacitive touch screen skills use human current to detect jobs. The capacitive touch screen is a 4-layer composite glass screen. The inner and outer surface of the glass screen and the interlayer are coated with a layer of ITO, and the outermost layer is a thin protective layer of silica glass. Sandwich ITO coating for the working surface, 4 edges guiding 4 electrodes, internal ITO for ...
|
|
HMI Faults and Solutions for Human-Machine Interfaces - Hitec
Human Machine Interaction (HMI), also known as user interface or user interface, is a preface and dialogue interface for transmitting and communicating information between humans and computers, and is an important part of computer systems. It is the interaction and information between the system and the user ...
|
|
What is the standard for the operation of the touch screen - Hitech
The touch screen must be clear, responsive and stable to be the standard contact display.
Tests that can be performed on your own
Use the checker provided in the driver to check the physical function of the contact screen ...
|
|
Industrial touch screen touch solves the problem of unresponsiveness
Many people have encountered industrial contact screen contact no response, no matter how we point to the industrial contact screen is not responding, at this time many people don't know what to do, today let's take a look at what to do when encountering industrial contact screen contact no response.
...
|
|
The defect of the capacitive touch screen - Hitec
The light transmittance and clarity of the capacitive contact screen are better than those of the four-wire resistive screen, and of course it cannot be compared with the external acoustic wave screen and the five-wire resistive screen.
The capacitive screen is severely reflective, and the four-layer composite contact screen of the capacitive skill has a strong impact on each wavelength ...
|
|
Touchscreen usage skills - Hitec
1. Run your app in full screen
Remove the file name bar and menu bar so you can enjoy the benefits of running the entire screen.
2. Choose bright colors (don't use black)
The bright color of the set can hide the finger prints, reduce the dazzling light and star...
|
|
Resistance touch screen non-response detection method - Hitech
1) Check whether the connection of the touch screen is right, and whether the connection of a cable connected to the keyboard port of the host (take the working voltage of the 5 volt touch screen from the keyboard port) is connected, please check the connection.
2) Observe the situation of the touch screen controlling the box light, if ...
|
|
How to choose the touch screen of industrial display - Hitec
1. Four-wire resistive touch screen:
It is not afraid of dust, oil and photoelectric disturbance, and is afraid of scratches is its main defect. It is suitable for public places with fixed users, such as industrial control sites, offices, homes, etc.;
2. Five-wire resistive touch screen:
Excellent sensitivity and transmittance ...
|
|
The difference between industrial displays and ordinary displays - Hitech
As a display terminal, the industrial display and the general computer display seem to be very similar in appearance, but in fact, there are great differences between the two in terms of structural planning, material selection and functional characteristics. Today, Freer has been planning the structure of the whole machine, the resolution and the appearance of the role, and the information ...
|
|
Contact
working hours
