人机界面的分类
Classification of man-machine interface
薄膜键输入的HMI：显示尺寸小于5.7'，画面组态软件免费，属初级产品。如POP-HMI 小型人机界面;
HMI input by film keys: display size is less than 5.7', screen configuration software is free, and it is a primary product. For example, POP-HMI small man-machine interface;
触摸屏输入的HMI：显示屏尺寸为5.7'～12.1'，画面组态软件免费，属中级产品;
HMI input by touch screen: display screen size is 5.7'~12.1', screen configuration software is free, belongs to intermediate products;
基于平板PC计算机的、多种通讯口的、高性能HMI：显示尺寸大于10.4'，画面组态软件收费，属高端产品。
High-performance HMI based on tablet PC with multiple communication ports: display size larger than 10.4', screen configuration software charges, belongs to high-end products.