Design and Application of Automatic Control System Based on Siemens TDC for Stainless Steel Hot Strip Mill

Stainless steel hot strip line integrated with mechanical electric hydraulic equipments is a complicated system. Automatic control system is very important for improving mill efficiency and products quality. The characteristics of hot strip line and its requests for automation, the idea of control system design, system structure and configuration are explained in detail. TDC(Technology drive control) system is the latest multiprocessor control system, and it is very applicable to real time multitask and high speed calculation system such as hot strip rolling. The hot strip rolling control system based on TDC is developed by ourselves. Multilevel system, high speed fabric Ethernet between levels, high speed global data memory network between controllers, high speed Profibus_DP network between controller and equipments, hot machine backup strategy of L2, fabric Ethernet redundancy of L1 and other innovative design ideas, L2 main mathematic models, L1 key control models are all applied in the system. Automatic control system designed according to the method has been applied on several hot strip mill lines.