labview与plc的串口通讯和labview的其他使用为plc和上位机通讯提供帮助-and plc labview labview serial communication and other uses for the plc and PC communication help

vb实现计算机和其他设备的串行通讯的例子。例如pc集合PLC、DCS等工业设备。,Realization of VB computer and other equipment serial communication example. For example, pc set PLC, DCS and other industrial equipment.

plc和PC机用MODBUSTCP协议通信的动态链接库文件。(The dynamic link library file MODBUSTCP protocol with PLC and PC.)