VC编写PC与PLC通信的程序，在VC与PLC串口通信时，运用MSCOMM控件可以实现通信-VC to write PC and PLC communication program VC PLC serial communication, the communication can be achieved using MSCOMM control

局域网时间同步：指定一个局域网内的电脑为同步服务器，其他电脑运行此程序就可同步服务器时间-LAN time synchronization: Specify a LAN PC synchronization server, other computers can run this program to synchronize server time

S7-200上位机发送程序，本人已检测，效果很好-S7-200 PC to send the program, I have been detected, with good results