基于工控机及PLC长轴氮化炉温度控制系统的研究

Research on Control System of Long Shaft Nitrifying StovesBased on Industrial Control Computer and PLC

为了提高深炉的控温精度及控制炉内温度的均匀性,运用PID控制理论,研究开发了一种基于工控机及PLC的长轴氮化炉计算机温度控制系统。通过工业计算机、西门子PLC、A/D,D/A模块、智能仪表、电动执行机构等控制单元实现系统及各个子系统之间的自动化控制。试炉结果表明,该炉温控制系统能获得最佳的控制效果。

To increase the temperature control precision of deep furnace ancl the inner temperature uniformity, using PID control theory, a control system of long shaft nitrifying stoves based on industrial control computer and PLC was developed. Based on Siemens PLC, A/D and D/A modules, intelligent instrument, electric actuator and so on, the date coupling for multi-controlled variables was realized to form compact control system. The results presented in testing furnace indicate that this system can obtain the best of control performance.