Research on Dynamic Weighing and Sorting System Based on PLC

Abstract

In the industrial production of instant noodles, accurately cutting fresh, non-fried noodle strands and controlling the weight of each portion are critical to ensuring product quality and cost efficiency. In response to the growing demand for automation in the instant noodle manufacturing process, this study proposes a dynamic weighing and control system based on a Programmable Logic Controller (PLC). The system utilizes the Siemens S7-1200 series PLC, specifically the CPU1217C module, as the central controller. Communication and data exchange between the PLC and various subsystems are realized through industrial Ethernet and related protocols. The proposed system is capable of precise cutting and real-time weighing of fresh noodles. Based on the measured weight, the system automatically sorts the noodles into acceptable and non-conforming batches. This approach significantly enhances the automation level of the production line, improves production efficiency, reduces operational costs, and strengthens the system’s control accuracy and stability. Experimental and practical results demonstrate that the dynamic weighing and sorting control system provides an effective solution for the design and optimization of automated instant noodle production lines. Furthermore, it offers theoretical and practical support for achieving fast, accurate, and cost-effective manufacturing.