这是我最近编写的一个污水处理PLC-s200的程序，能够正常运行，希望对大家有参考作用。-Which I have recently written a PLC-s200 sewage treatment process, to work correctly, we want to have reference.

VB做的上位机软件，和西门子S200通讯，代码是其他网站下载的，这里是转载吧 个人感觉对做VB和200通讯很有帮助，大神级的就不用学习了，新手可以借鉴一下。彼此进步吧！！！(VB to do the host computer software, and Siemens S200 communication, the code is downloaded from other websites, here is the reprint bar personal feeling to do VB