与西门子PLC通讯的Labview库，还不错。 以下是英文声明： Warning, the attached files are experimental VIs provided for educational purposes only. No warrantee is expressed or implied. You should test your code and completely understand the implications of writing to or rea
说明： 自己编译的非常强大的西门子S7系列通信库，可以摆脱OPC的收费困扰 (To compile a very powerful Siemens S7 series of communications library, you can get rid of troubled OPC charges)
