带钢热连轧加热炉钢坯定位控制系统改造研究

Study on Modification of Billet Positional Control System of Heating Furnace in the Hot Strip Continouous Mill

对原钢坯定位控制系统进行了升级改造,硬件方面将主PLC上的CPU924~927换成CPU945,4块数字位置译码器IP241模板移植到主机架上,取消原机架;软件方面使用2种标准功能块FB156和FB157对IP241进行了初始化与同步化,修改了CPU与CP间的通讯处理程序和钢坯定位程序.较好解决了系统兼容和升级性能的难题.

The original billet positional control system is modified,CPU924~927 on the main PLC are replaced by single CPU945 of S5-115U,and the four pieces of digital position encoder IP241 are moved to the main frame,the original frame is cancelled;the initialization and the synchronization of IP241 are carried out with two standard function blocks FB156FB157.HDB between CPUCP,and the billet positional program are modified.The problem about system compatibility and upgrading of performance is better solved.