| 摘要 |
PURPOSE:To transfer a data efficiently, by providing a master unit between a host processor and a terminal equipment, and transmitting a data sent out from the terminal equipment. CONSTITUTION:A master unit 5 sends and receives data between a host processor 1 and terminal equipments 2-0-1-n, and a master unit 6 sends and receives data between the processor 1 and terminal equipments 3-0-3-n. When a customer has purchased goods, data such as an item number, the quantity of sale, the amount of money, each transaction data, a machine number of terminal equipment, etc. are sent out from the equipments 2-0-3-n, and are set to a buffer memory 5-5 through a low rank circuit control part 5-4. Subsequently, when data of a prescribed quantity have been collected in a buffer 5-0 at a lower speed than a speed at which a data is transmitted between the master unit and the terminal equipment, its data are transmitted the processor 1 from the master unit. |
