the use of screen display, through the input unit (such as screen, keyboard, mouse, etc.) parameters or input commands written work, realize the information interaction of digital human and machine equipment, composed of two parts of hardware and software.

Composition and working principle of HMI products. HMI products are composed of hardware and HMI software. The hardware includes a processor, display unit, input unit, communication interface, data storage unit, etc. The performance of the processor determines the performance of HMI products and is the core unit of HMI. Depending on the HMI product class, processors can be 8-bit, 16-bit, or 32-bit.HMI software is generally divided into two parts, namely system software running in HMI hardware and screen configuration software running in PC Windows operating system (such as JB-HMI screen configuration software). Users must first create “engineering files” using HMI’s screen configuration software, and then download the “engineering files” to the HMI processor through the SERIAL communication ports of the PC and HMI products.