在实际应用中PLC 读入的是一个二进制编码值，必须将该值变换成氧枪的绝 对高度值。 马钢第一炼钢厂1#转炉氧枪转动装置是采用GE DV300全 数字直流传动，通过Profibus现场总线实现数据的交换。马钢第一炼钢厂的氧枪位置控制是一个闭环控制，其具体 的控制思想是：氧枪的绝对目标高度（Htar）与氧枪的绝 对实际高度（Hact）的差值的符号决定电机的旋转方向。
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