The application of PLC in the bar code printer

The application of PLC in the bar code printer newmaker welcome to e hall exhibition hall 3 PLC PLC controller programmable controller, PLC programming cable. 。 。 This paper introduces the PLC controller free port communication with the printer. PLC communication board plays an important role in the device's control. Key words: printer; PLC； Free port communication; One, the preface this article focuses on the subject of automotive testing equipment, for the modification of control system, PLC, instead of the original relay control way, realized the reduction in the number of output points and relay to make maintenance more convenient, improve the production efficiency. And real-time print the corresponding bar code for the qualified products. At the same time, through the touch screen can be interactive advantage, realize the real-time monitoring of the check. Second, the project profile, 2. Introduction to industry since the reform and opening, with the start and development of car industry, our country automobile enterprise with multinational automotive group ( 6 + 3) Joint ventures, the introduction of foreign technology production cars. At the same time, the international automobile components form a complete set of the original suppliers of big companies in foreign countries, in succession with the vehicle company together into China, the new joint venture or wholly foreign owned enterprise, one after another the introduction of foreign advanced technology and equipment, technical renovation, to establish local car parts supply system. With the introduction of models such as the audi A6, passat B5, the baolai, polo, buick, accord products such as the improvement of technical level, improve the technical level of the components in our country and the enterprise production management level, and promote the development of the auto parts industry in China, laid a good foundation for the vehicle development. Due to the implementation of the localization, has trained a large number of domestic parts enterprises, make the auto parts manufacturing capacity in China has greatly improved, effectively support the business development of the vehicle. 2. 2 customer demand requirements of customers for each product testing is completed and then print out the corresponding bar code. 2. Three solutions to auto parts inspection system controlled by PLC relay output terminals, FBs - through CB2 communication board connected printer, use FUN151 instructions for printers to send command and content. 2. 4 the solution context convenient PLC ladder diagram programming instructions, greatly improving the efficiency of programming, strengthened the readability of the program. Favored by the majority of small and medium-sized PLC users. For the commonly used two 3 way solenoid valve, PLC can control output directly through the contact. PLC to support the expansion of communication interface card, the communication rate of up to 921. 6Kbps。 PLC standalone to extend a maximum of 5 communications. Support the Modbus communication protocol, for private use, such as common data communication protocol, the commonly used RS - any configuration And RS - 232 485 communication mouth. PLC are simple set of instructions, can be simple and convenient to complete the PLC host communications with other devices. Three, the design of the control system of 3. 1 hardware configuration of the equipment are in need of configuration of PLC communication board. Models of FBs - host 40 ma, communication board for the FBs - Choose the FT - CB2, touch screen 070ST- T41R, still need to electromagnetic valve of choose and buy, photoelectric switch, etc. The following is the equipment control system structure diagram ( As shown in figure 1) 3. Under 2 electrical wiring design of I/O points distribution control cabinet is the overall figure ( As shown in figure 2) Four, the software design 4. 1 communication parameter setting ( As shown in figure 3) Five, equipment debugging. 5. Part 1 printer debugging to print bar code printers, some instructions sent to the printer will need to PLC, we through PLC FUN151 communication instruction through free port communication sent some corresponding instructions to control the printer to print the barcode. The following is to print bar code instructions ( As shown in figure 4) 5. 2 whole equipment debugging through PLC control, can control some testing instrument to test the car parts, testing is completed by FUN151 communication instructions sent to print bar code printer to print out the corresponding bar code. The following is the overall equipment figure ( As shown in figure 5) Six, analysis of the difficulties due to our free port communication protocol of the printer and printing the instruction don't understand, so you need to access to relevant data and test, to be familiar with PLC and printer Settings of communication. （ As shown in figure 6) After the equipment operation, equipment debugging, customer automotive test equipment and printers for a period of time using the test. This equipment can according to customer's control effect to finish the process, able to complete the detection requirements of auto parts and print out the qr code required. Eight, application experience through the project made me understand the PLC in the free port communication advantage. PLC powerful instruction set, make the programming more human, easy to understand. Table setting make the operation more simple, use cache form in the project, through this form as a guide to set the communication instruction related data, makes the operation more simple. Hardware reliability is high, in the process of the operation of the equipment, PLC controller continues to run, not abnormal, customers on the product hardware performance.
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