plc programs in s73-plc programs in s7300

PC(高级语言编程)与西门子S7300/400通讯方法总结（Prodave是西门子提供的一个软件包，为高级语言编程和plc通讯提供接口）-PC (high-level language programming) and Siemens the S7300/400 communication method the summary (Prodave is Siemens to provide a package providing an interface for the high-level la

在没有公开通讯协议的情况下，借助西门子提供的Prodave 软件包中的库函数，用VC 进行编 程，实现PC 通过MPI 方式与PLC 通讯。-In terms of no open communication protocol， library functions of the Siemens Prodave package can be used by programming with VC． And then，the MPI communications of PC and PLC