想找一些siemens的S7-300的PLC中文及对应的英文资料，谢谢！

找 siemens 或 siemens代理商索取

其实S7-300的资料在网上是比较多的，但也不容易找，特别是连接地址老是变，原来我在论坛帖的下载地址经常失效，改来改去都烦了。

有一篇文章，前言是：
With Siemens’ introduction of their SIMATIC S7-300 and S7-400 families of PLCs, they’ve established a new network protocol specifically for the S7-300 and S7-400 PLCs. You can use this network protocol to communicate through the PLC’s MPI port without the use of a Siemens Profibus CP.

However, if you desire faster communications, you will need to add a Profibus CP to the PC. Siemens offers communication processors for the L2 network (CP 342-5 DP for S7-300 PLCs) and for the Industrial Ethernet network (CP 443-5 for S7-400).

The L2 network uses the same media and the same first layer of the Profibus network. The Industrial Ethernet network works in the same way as the Ethernet network. That is, you can use the Industrial
不知是否有用。

上www.gongkong.com资料处找找看....

西门子PLC的资料太多了，估计有十来本，网上好象只有SETP7 5.0的使用手册（中文版），代理商那儿还是比较全的，可惜是要付钱的。

西门子的东西都要钱，真是西门庆的孩子！！！