半导休逻辑元件组成的程序控制器,在冶金企业中应用广泛。国内255m~3以上的高炉装料控制大部分都采用这种控制系统,取代了五十年代的有触点装料程序控制。这种逻辑元件程控装置,具有可靠性好,维修工作量少等优点,尤其是对于那些重复操作频率较高,操作环境恶劣的场合更为适用。我厂三号高炉槽下的半导体逻辑程控器使用以来,运行稳定可靠,抗扰能力强。它不仅大大提高了高 Semiconductor logic components composed of the program controller, widely used in metallurgical enterprises. Most domestic 255m ~ 3 blast furnace charge control most adopt this kind of control system, which replaced the control method of contact charging in the 1950s. This logic device program-controlled devices, with good reliability, less maintenance and other advantages, especially for those who repeat the operation of higher frequency, poor operating environment is more applicable to the occasion. Since the use of the semiconductor logic programmable controller under the tank of the No. 3 blast furnace in our factory, the operation has been stable and reliable and the anti-interference ability is strong. It not only greatly increased the height