To rise, lower cliver direction and change speed, can measure each motor trouble phenomenon and send this to touch-sensitive screen of industry to show at the same time, have reduced traditional electricity-Contact-type control system of intermediate link. 吊钩的升、降方向及速度换档,同时能检测各个电机故障现象并送往工业触摸屏进行显示,减小了传统继电&接触式控制系统的中间环节。