基于S7-300PLC的中厚板层流冷却控制设计

The Bachelor's degree thesis "Design Specification of Laminar Cooling System Control Based on PLC for Medium and Thick Plates" focuses on the control cooling method for post-rolling steel plates, specifically laminar cooling, also known as water curtain cooling. Laminar cooling is a control cooling method widely used in the cooling production lines of major steel companies. It involves spraying cooling water from both the top and bottom of the steel plate to achieve the cooling purpose by impacting the upper and lower surfaces of the steel plate. To ensure the accuracy of the cooling control, the Siemens S7-300 PLC is adopted for precise calculations and fast operations. Manual control mode is affected by external factors, which can affect the cooling effect. Therefore, this thesis adds an automatic control mode on the basis of manual control mode, allowing the system to operate in a combined mode of manual and automatic control, which better meets the requirements of cooling effect. The program is debugging using a variable table, and simulation results are provided. Keywords: control cooling, laminar cooling, S7-300