VB2010,C#2010与西门子S7-200SMART的PLC进行以太网通讯的工程代码，支持浮点、双整型数据等类型，无须在PLC内编程配合，直接通过网络接口访问PLC的数据区域，包括DI,DQ,M,V；-VB2010, C# 2010 and Siemens S7-200SMART PLC for Ethernet communication engineering code to support floating-point, do

MODBUS RTU 485 单台仪表通信取数(The number of MODBUS RTU 485 single meter communication)

西门子PLC S7-200，200smart, 300 & S7-400系列TCP连接上位机程序，无需PLC端再编程, 免费，支持24点数。(SIEMENS PLC S7-200200smart, 300 & S7-400 series TCP connection PC program, without the PLC end reprogramming, free, support 24 points.)

西门子S7-200SMART库,直接解压放在SMART库文件夹下即可。(SIEMENS S7-200SMART library is directly decompressed and placed under the SMART Library folde)