You should know that POS machine (Pointofsales) is a terminal reader equipped with barcode or OCR code technology, which has the function of teller of cash or barter bank, provides data service and management function for commodity and media transactions, and carries out non-cash settlement. Widely used in electronic systems in retail, hotel and other industries, its main function is to count the sales, inventory and customer purchase behavior of goods, and the operating efficiency can be improved through this system. The basic principle of POS system is to create commodity data in a computer file, directly read the barcode on the commodity through the online structure of the computer cash register and the optical reading device on the cash register equipment (or directly input the code through the keyboard), and then display the commodity information (unit price, department, discount ...) immediately, so as to speed up the cash register and correct it. The detailed information of each commodity sale (price, department, time period and customer level) is automatically recorded and then sent back to the computer by the online framework. Through computer calculation and processing, various sales statistics and analysis information can be generated as the basis for management.
The POS machine reads the magnetic stripe information on the cardholder's bank card through the card reader, the POS machine operator inputs the transaction amount, and the cardholder inputs the personal identification information (i.e. password). The POS machine sends the information to the issuing bank system through the UnionPay center to complete the online transaction, give the information of success or failure, and print the corresponding bill. The application of POS realizes the online consumption of credit cards, debit cards and other bank cards, ensures the safety, rapidity and accuracy of transactions, avoids complicated labor such as manual blacklist inquiry and bill pressing, and improves work efficiency. The design requirements of magnetic stripe card module meet the needs of three-track magnetic cards, that is, the module should be able to read magnetic cards with 1/2, 2/3 and 1/2/3 tracks.
Before using the POS machine, it is necessary to check whether the power supply is connected, whether the connection between the printer and the host is normal, and whether the POS printing paper is installed. Pay attention to the security of accounts!