One touch solutions.PLC system integration. Touch screen, also known as “touch screen” and “touch panel”, is a kind of inductive liquid crystal display device which can receive input signals such as contacts.

When touching the graphic buttons on the screen, the tactile feedback system on the screen can drive various connecting devices according to the pre-programmed program, which can be used to replace the mechanical button panel and create vivid audio and video effects through the liquid crystal display screen.

As the latest computer input device, touch screen is the most simple, convenient and natural way of human-computer interaction at present. It gives multimedia a new look, and it is a very attractive new multimedia interactive equipment. It is mainly used in public information inquiry, leadership office, industrial control, military command, video games, song and order, multimedia teaching, real estate pre-sale and so on.

Second, basic common sense.

1. Definition of man-machine interface products.

Connecting PLC, frequency converter, DC governor, instrument and other industrial control equipment, using display screen, writing working parameters or inputting operation commands through input units (such as touch screen, keyboard, mouse, etc.), a digital device that realizes the exchange of information between human and machine, which is composed of hardware and software. HMI is the abbreviation of Human-Machine Interface.

two。. Composition and working principle of Human-computer Interface (HMI) products.

The man-machine interface product is composed of hardware and software, and the hardware part includes processor, display unit, input unit, communication interface, data storage unit and so on. The performance of the processor determines the performance of HMI products and is the core unit of HMI. According to the product grade of HMI, processors can choose 8-bit, 16-bit and 32-bit processors respectively.

HMI software is generally divided into two parts, namely, the system software running in HMI hardware and the picture configuration software running in PC Windows operating system (such as JB-HMI picture configuration software). Users must first use the picture configuration software of HMI to make “engineering files”, and then download the compiled “engineering files” to the processor of HMI through the serial communication port of PC and HMI products.

3. Basic functions and selection Indexes of Man-Machine Interface products.

Basic functions:

Equipment working status display, such as indicator lights, buttons, text, graphics, curves, etc.

Data, text input operation, print output.

Production formula storage, equipment production data recording.

Simple logic and numerical operations.

Can connect a variety of industrial control equipment networking.

Selection index:

Display screen size and color, resolution.

Processor Speed performance of HMI.

Input method: touch screen or film keyboard.

Screen storage capacity, note whether the capacity unit marked by the manufacturer is byte (byte) or bit (bit).

The type and number of communication ports, and whether the printing function is supported.

4. Product classification of man-machine interface.

The HMI input by the film key has a display size of less than 5.7. the screen configuration software is free and belongs to the primary product. Such as POP-HMI small man-machine interface.

The HMI input by the touch screen has a screen size of 5.7mm 12.1. The screen configuration software is free of charge. It is an intermediate product.

Based on the tablet PC computer, a variety of communication ports, high-performance HMI, display size greater than 10.4, picture configuration software charges, is a high-end product.

5. The use of man-machine interface.

Clearly define the requirements of monitoring tasks and select the appropriate HMI products.

Editing “Engineering File” with Picture configuration Software on PC.

Test and save the edited “project file”

PC connects HMI hardware and downloads “engineering files” to HMI.

Connect HMI and industrial controller (such as PLC, instrument, etc.) to realize human-computer interaction.