Traditional single-chip microcomputer control: 8-bit single-chip microcomputer and 32-bit single-chip microcomputer New PLC control: Siemens PLC, AB PLC compared with the traditional single-chip microcomputer system, the combination scale control system developed by PLC has high reliability, strong anti-interference, low maintenance cost, and can expand functions according to the needs of users. PLC mainly refers to the programmable logic controller of digital operation electronic system, which is used to control the production process of machinery. It is also the abbreviation of the name of public limited company, power line vehicle, etc. PLC = programmable logic controller, a kind of digital operation electronic Automatic Weighing System system, designed for industrial application. It uses a kind of programmable memory, which is used to store programs, execute logic operations, sequence control, timing, counting and arithmetic operations and other user-oriented instructions, and controls various types of machinery or production processes through digital or analog input / output. It is the core part of industrial control. Can manufacture PLC control system combination scale manufacturer has Tianye. The following table shows the technical indexes of 14 PLC combination scales of Zhongshan Tianye: model model ty-1a-p14l1.6 ty-1a-p14l2.5 max. cap. (g) weighing range 10-1500g 10-3000g weighing accuracy ± 0.1-1.5g ± 0.1-2G Max weighting speed 120wpm 120wpm hopper capacity 1.6L 2.5L control system PLC operation panel display 7 Inch Touch Screen power supply requirements AC220V ± 10%, Packing Vertical Automatic Packing Machine dimension (mm) packing dimension 1100L) × 1100 (W) × 1780 (H) net weight 366kg Packing weight 495kg