Design Of Southern China Copper Aluminum Annealing Furnace Group Transformation System

South China copper aluminum four group PLC automatic control system for annealing furnace.Furnace is the enterprise production of a very important control system,based on this background,on the original set of control system of annealing furnace.Furnace carried out a series of technical reformation,designed a high automation,safe and reliable running,with functions of environmental protection and energy saving and high control precision of annealing furnace control system.This design mainly include timing and constant temperature control,temperature control and end control curve correction,oven door logic control,heat circulation fan and thyristor controlled main control system,etc.The detailed design of the system hardware and software part,in order to ensure the rapid and accurate of annealing furnace temperature control and stability,designed based on fuzzy self-tuning parameters for method,the temperature control system of fuzzy PID controller is given.This system adopt PLC master-slave station control scheme.From a website thermocouple to test the temperature,the furnace on different position sensor signals sent,successfully avoids the analog signal transmitted over long distances in the process of all kinds of interference.System based on profibus-dp industrial bus network,using CPU315-2 DP as the main,ET200 M ACTS as an interface,bridge and touch screen from the station,the bus agreement can successfully achieve PLC master-slave station,the communication between the converter and touch screen devices.Using MODBUS as communication protocol,through frequency converter profibus-dp fieldbus system remote monitoring.The system has been in qingyuan city of south China copper aluminum industry co.,LTD.,field operation and use,improved system can realize high precision temperature control system,this system in the whole annealing industrial process with reliable and stable control performance,at the same time operating system easy to learn,to be promoted in the production of metallurgical industry.