The simplest definition of a touch screen human-machine interface is that between humans and machines, through a certain interface, humans can give instructions to machinery and equipment, and machinery and equipment can feed back the execution status and system status to the user through this interface. In other words, the correct communication of information and instructions between man and machine is the main definition of man-machine interface.
The man-machine interface can be connected to industrial control equipment such as programmable logic controllers (PLC), frequency converters, DC speed controllers, meters, etc., using the display screen to display, and writing work parameters through input units (such as touch screen, keyboard, mouse, etc.) Or input human operation commands to realize the information interaction between human and machine equipment. The human-machine interface is composed of hardware and software.
Human-Machine Interface (Human-Machine Interface, HMI) is a field that covers multiple technologies, including human factors engineering, ergonomics, computer science, artificial intelligence, cognitive psychology, philosophy, sociology, and anthropology Disciplines such as design, design, and engineering cannot be completely observed and researched from the perspective of IT technology. Even among them, the importance of cognitive psychology may be more important than computer science.
Strictly speaking, the man-machine interface is essentially different from the "touch screen" that people often call. Because the "touch screen" is only the hardware part that may be used in human-machine interface products, it is an input device that replaces some of the functions of the mouse and keyboard and is installed in the front of the display screen. The human-machine interface product is a human-computer interaction device that includes hardware and software. In industrial applications, people often refer to man-machine interface products with touch input function as "touch screen" for short, but this is unscientific. A man-machine interface with touch input function should be called "touch man-machine interface".
Human-machine interface products include hardware and corresponding dedicated screen configuration software. Generally, different manufacturers' human-machine interface hardware use different screen configuration software, and the main connected device is PLC. The configuration software is a general-purpose tool software product that runs on the PC hardware platform and Windows operating system. The configuration software and PC or industrial computer can also be used as a computer interface product. The universal configuration software supports a wide range of equipment types, such as various PLCs, PC boards, meters, inverters, modules and other equipment, and because of the powerful performance of the PC hardware platform (mainly reflected in the speed and storage capacity), it is universal The function of the configuration software is also much stronger, suitable for large-scale monitoring systems.
