It introduces the simple controller which consists of Simens PLC S7-224 CPU,A/D EM231 and TP170A touch screen. The controller controlls the ferroalloys submerged arc furnace by means of indirect impedance method.

• 介绍了西门子PLC S7-224 CPU、A/D EM231、TP170A触模屏组成的简易控制器,该控制器采用间接阻抗法实现对铁合金矿热电炉控制。