The importance of HMI - description of PLC industrial control system

The abbreviation of HMI is the Human Machine Interface, man-machine Interface, also known as the man-machine Interface. The man-machine interface ( Also known as the user interface or the user interface) Is the interaction between system and user and the information exchange medium, it can realize the internal form and human accept form conversion between. All participate in man-machine communication field there is a man-machine interface. =

PLC Programmable Logic Controller, Programmable Logic Controller, a digital computing operation of electronic systems, specially designed for applications in industrial environment. It USES a programmable memory for its internal storage procedures, to perform the logic operation, sequence control, timing, counting and arithmetic operations such as user-oriented instructions, and through the digital or analog input/output control various types of machinery or production process. Is the core part of industrial control.

overview

system of cutting zone is an important section in float glass production line, including the measurement of transmission, slitting, crosscutting, snapping off acceleration, break off the edge, vertical and longitudinal snapping points, roller conveyer, and many other production control equipment. System hardware is mainly composed of main controller PLC, field device control device, including servo controller, inverter, analog signals, the pulse signal processor and HMI, etc. Basically has the following content: the system parameter setting; Dynamic display of the picture; Fault alarm and diagnosis. The HMI display control company SA - shenzhen 5. 7 man-machine interface.

HMI and PLC communication between

when HMI for PLC control system, through serial communication between HMI and PLC to Direct Link ( Direct connection) Way to communicate. In this way, the HMI directly read in PLC according to the requirement of data or the data written to the PLC in the corresponding address. Due to the built-in communication protocol, so no communication program, as long as the specified type of PLC used in the communication protocol, the runtime can realize communication. Thus greatly reduce the burden of the PLC controller user program. Directly read or rewrite the content of PLC corresponding address, and change the screen display content. At the same time through the HMI touch, but the address of the corresponding input data to the PLC.

HMI monitor primary side

the HMI monitor system USES the tree structure, by monitoring the main images and the corresponding function of Sprite. In monitoring the main screen bottom has a control function keys, press the function key can in turn into corresponding Sprite, perform the desired function. In each child in the picture can be back, the next function button to switch from the picture, in the same functional groups at any Sprite can be covered by the main frame function keys back to monitor the main picture. System automatically collecting relevant data, cutting plan, measure the pulse, roller speed and some other important production process parameters shown in the main picture, is advantageous for the operator to observe. Monitoring on the main screen and production process, according to the dynamic images in various forms on the dynamic images simulate the running situation of the main control equipment, such as photoelectric switch action, the operation of the absorption of electromagnetic valve, the motor stopped, intuitive, vivid reflects the scene of the process, easy operation personnel understanding of production situation, the working condition of equipment. Display control SamDraw3 company HMI programming software. 1 provides a rich control components, such as button, switch components, light components, data, text display components and so on, to achieve the above functions as long as according to the need to select the corresponding control unit, defined its properties. SamDraw3。 1 general pattern with monitoring software, all forms of control part properties through configuration is complete, in order to achieve the corresponding control function. Use SamDraw3. 1 enclosed gallery and drawing tools to construct the simulated images of manufacturing, easy. Rich content of drawing tool library, making the vivid, colorful picture. And SamDraw3. 1 also supports picture upload and custom gallery features, users can easily life become a gallery or control the local picture, in the later in the process of configuration can easily call.

in addition, make full use of the advantage of HMI to the original arrangement in the ark of the switch, indicator light as much as possible with the control unit to replace in the HMI, do reduce the hardware device, simplify the connection between the field devices, more important is to bring so much convenient design and debugging.

plc controller price are required in the manufacture of almost every product and programmable control systems plc manufacturers is one of the most common machines.
If you follow these straightforward steps you can keep your plc controller price programmable control systems. I think this article will help you make a wise decision on choosing the right .
Although the core manufacturing factor of plc manufacturers is high technology, smart customers know that we need to enhance our material quality and producing standard.
When selecting the best products for customers, we considered not only the plc manufacturers, but also the plc controller price.
Shenzhen Coolmay Technology Co., Ltd. have significantly changed the way customers approach manufacturing. plc manufacturers can still compete if we are willing to change the ways in producing.