虚拟串行驱动程序(VSPD)是一个可在计算机(Windows)下操作的程序，此驱动程序会创造数个“虚拟”的串行口。-Virtual Serial Driver (VSPD) is a computer (Windows) operating under the program, this driver would create a "virtual" serial port.

Profibus master slave VSPD 测试软件(Profibus master slave VSPD)