程序包括一组子程序和中断程序，通过S7-200自由端口功能来产生从Modbus RTU. 它支持下列Modbus功能：----1.读输出(线圈)----2.读输入(触点)----3.读保持寄存器(V.. -includes a subroutine and the interruption procedure for the adoption of the S7-200 free port functions to generate from the Modbus RTU. It support

实现一个Ftp搜索工具，主要介绍了属性页控件，对指定IP执行Ping命令查看主机存活状态，扫描主机端口，打开、添加、查询和关闭数据库，IP地址控件的使用等。-achieving a search tool, mainly on the properties page controls, the implementation of a designated IP Ping order to survive View host state, scanning host ports, open, ad