Human machine interface product basic knowledge - Database & Sql Blog Articles

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1. The definition of human-machine interface products is connected with industrial control devices such as programmable controller (plc), inverter, DC governor, instrument, etc., which are displayed by input screen (such as touch screen, keyboard, mouse, etc.). The digital device that interacts with the working parameters or inputs the operation commands to realize the interaction between the human and the machine is composed of hardware and software. Hmi is an abbreviation for English Human-Machine Interface.
2. The composition and working principle of human machine interface (HMI) products The human interface products are composed of hardware and software. The hardware part includes processor, display unit, input unit, communication interface, data storage unit, etc. The performance determines the performance of HMI products and is the core unit of HMI. 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 (such as the JB-HMI screen configuration software) running under the Windows 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.
3. Basic functions of human-machine interface products and basic functions of selection indicators:
Device working status display, such as indicators, buttons, text, graphics, curves, etc.;
Data, text input operation, printout;
Production recipe storage, equipment production data record;
Simple logic and numerical operations;
Can be connected to a variety of industrial control equipment networking.
Selection indicator:
Display size and color, resolution;
HMI processor speed performance;
Input method: touch screen or membrane keyboard;
Screen storage capacity, note that the unit of capacity indicated by the manufacturer is byte (byte) or bit (bit);
Whether the type and number of communication ports support printing.
4. HMI product classification The HMI of the membrane key input has a display size of less than 5.7ËŠ, and the screen configuration software is free, which is a primary product. Such as POP-HMI small human machine interface;
The HMI of the touch screen input, the display size is 5.7ËŠ~12.1ËŠ, the screen configuration software is free, and it is a mid-level product;
Based on the tablet PC computer, a variety of communication ports, high-performance HMI, display size is greater than 10.4 ËŠ, screen configuration software charges, is a high-end product.
5. The method of using the human-machine interface clearly monitors the task requirements and selects the appropriate HMI product;
Edit the "project file" with the screen configuration software on the PC;
Test and save the edited "project file";
The PC is connected to the HMI hardware and the "project file" is downloaded to the HMI.
Connect HMI and industrial controllers (such as PLCs, meters, etc.) to achieve human-computer interaction.