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 the hardware part that may be used in the human-machine interface product, it is an input device installed at the front end of the display screen instead 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 the corresponding special screen configuration software, in general, HMI hardware of different manufacturers use different screen configuration software, and the primary equipment variety is PLC. The configuration software is a general software product running in the PC hardware channel and the windows operating system, and can also form HMI products together with the PC or industrial computer; There are many types of equipment supported by the general configuration software, such as various PLCs, PC boards, appearances, inverters, modules and other equipment, and because the hardware channel function of the PC is strong (the primary response is in the speed and storage capacity), the function of the general configuration software is also much stronger, which 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, the system software runs in the processor of the HMI, supports multitasking functions, and the processor needs to have a small operating system management system software to run. 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 deal with the human-computer interaction problem of PLC, but with the development of computer technology and digital circuit technology, many industrial control equipment have serial communication capabilities, so as long as there are 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 standardized serial communication port?
Most of the time it is. However, with the development of computer and digital circuit technology, 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 lot of common device communication drivers that can be selected; In general, as long as the communication driver corresponding to the connecting device is selected in the screen configuration software of the HMI, the communication connection between the HMI and the device can be completed. 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 type of communication port and the protocol content of the device to be connected, and ask the HMI manufacturer to compile the communication driver for the device on behalf of the user.
7. Can the PC and touch screen communicate directly with the PLC to complete the function of HMI?
Absolutely. However, it is necessary to compile the corresponding HMI software in order to make the PC a real HMI product.
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Introduction to common sense of human-machine interface - Hitec touch screen
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 a replacement for the mouse and keyboard part of the function, the installation ...
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Hitec touch screen new and old models replacement selection
Hitec touch screen selection:
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The development trend of Chinese machine interface
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The driving principle of the capacitive touch screen - Hitech
1. Projective capacitive contacts
Although the basic structure and working principle of a projected capacitive contact screen is the same as that of a four-wire impedance film, the projected capacitive impedance film does not go through the contact field, but captures the change in capacitance between the electrodes. Generally speaking, when using the form of a capacitive sensor, it can be ...
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The common reason why the touch screen and the PLC cannot communicate - Hitech
1. Whether to select the correct communication protocol (Modbus, PROFIBUS, CANopen, EtherCAT)
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Touch screen and PLC combined with inverter application - Hitech
Programmable manipulators (PLCs) have always played an important role in the field of industrial field control. With the increase of the country's investment in the water supply profession, the level of automation of water plant operation has been continuously improved, and the use of PLC in the water supply profession has gradually increased. The touch screen is used with the PLC, which makes the PLC ...
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Categories and Advantages and Disadvantages of Resistive Touch - Hitech
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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, ...
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Resistive screen and capacitive screen of industrial tablet PC - Hitech
There is a difference in skills
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Touchscreen click accuracy decreases - Hitech
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Introduction to Hitec touch screens
HITECH is a *** in Taiwan, known as Hitech in Chinese mainland. It is the *** of Taiwan Quanyi Electronics Co., Ltd., which was established in 1981 and initially produced electronic watches for pens. In order to transform Quanyi into a technology-oriented company, in 1984 began to develop ...
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Hitec touchscreen copy program
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How to duplicate the program on two Hitec touch screens
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The meaning of Hitec's touchscreen DIP switch
SW1/SW2 is saved
sw3/SW4
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