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      Man-machine interface HMI detailed knowledge introduction

      2021-08-12
              In the future, the division of high, medium and low functions of HMI products will be less and less obvious, and the functions of HMI will be more and more abundant. Due to the reduction of computer hardware cost, HMI products will mainly take tablet PC computers as the high-end products of HMI hardware. Because this high-end product has great advantages in processor speed, storage capacity, communication interface type and quantity, networking ability, and software resource sharing, it is the development direction of HMI products in the future.
      Is the HMI only connected to PLC?
              That's not true. Human-machine interface products is to solve the problem of PLC human-computer interaction, but with the development of computer technology and digital circuit technology, many industrial control equipment has a serial port communication ability, so as long as there is a serial port communication ability of the industrial control equipment, such as frequency converter, dc speed regulator, temperature control instrument, for module can connect human-machine interface products, To implement the human-computer interaction function.
              What is the difference between the human-machine interface and the "touch screen" that people often say?
              Strictly speaking, there is a fundamental difference between the two. Because the "touch screen" is only the hardware part that may be used in the man-machine interface products. It is an input device installed in the front of the display screen to replace the functions of the mouse and keyboard. The human-machine interface product is a kind of human-machine interaction device which includes hardware and software. In industry, people often refer to the human-machine interface products with touch input function as "touch screen", but this is not scientific.
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