LED屏幕播放节目、字体大小、特效、速度等控制。声光报警灯控制，通过PLC加继电器模块、以太网模块等，实现远程声光报警控制，从而把现场情况通过电子公告屏和声光提醒的方式唤起用户做相应的操作。-LED screen broadcast programs, font size, effects, speed control. Sound and light warning light is controlled through PLC and relay module, Ethernet modul