使用高级语言，通过S7NetPlus.dll，可以与西门子PLC进行S7通讯，程序为动态链接库的源代码，可以生成DLL(S7.Net is a plc driver that works only with Siemens PLC and only with Ethernet connection. This means that your plc must have a Profinet CPU or a profinet external card (CPxxx card). S7.Net