Modbus 通讯协议，可以应用在触摸屏与PLC之间通讯，232与485都可以通用。-Modbus communication protocol can be used to communicate between the touch screen and PLC, 232 and 485 can be common.

这是一种舞台灯光的协议DMX512,一种485通信，这是一个发送程序-This is a stage lighting protocol DMX512, one kind of 485, which is a transmission program