HMI is the abbreviation of Human Machine Interface, which is called "human machine interface", also called human machine interface. The HMI human-machine interface is a medium for interaction and information exchange between the system and the user, which realizes the conversion between the internal form of information and the acceptable form of human beings. There are human-machine interfaces in all fields of human-computer information exchange.
What does the hmi human machine interface include?The human-machine interface product consists of hardware and software. The hardware part includes the processor, display unit, input unit, communication interface, data storage unit, etc. The performance of the processor determines the performance of the HMI product and is the core of the HMI. unit.
Depending on the product class of the HMI, the processor can use 8-bit, 16-bit, 32-bit processors, respectively. The HMI software is generally divided into two parts, namely, the system software running in the HMI hardware and the screen configuration software running on the PC operating system of the PC. Users must first use HMI's screen configuration software to create "project files", and then download the compiled "project files" to the HMI processor through the serial communication port of the PC and HMI products.
Basic functions and selection indicators of HMI human-machine interface products
1) device working status display;
2) Data, text input operation, print output;
3) Production formula storage, equipment production data record;
4) Simple logic and numerical operations;
5) Can be connected to a variety of industrial control equipment networking.
Selection indicator:
1) display size and color, resolution;
2) processor speed performance of the HMI;
3) Input method: touch screen or membrane keyboard;
4) The picture storage capacity, pay attention to whether the capacity unit marked by the manufacturer is byte or bit;
5) Whether the type and number of communication ports support the printing function.
4, HMI human machine interface product classification
The HMI of the membrane key input has a display size of less than 5.7 inches, and the screen configuration software is free, which is a primary product.
The display size is 5.7ËŠ~12.1ËŠ, and the screen configuration software is free. It is a mid-level product. Based on the tablet PC computer, a variety of communication ports, high-performance HMI human-machine interface, display size is greater than 10.4 ËŠ, screen configuration software charges, is a high-end products.
5, the use of human-machine interface
1) Clearly monitor the mission requirements and select the appropriate HMI product;
2) Edit the "project file" with the screen configuration software on the PC;
3) Test and save the edited "project file";
4) Connect the HMI hardware to the PC and download the “Project File†to the HMI.
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