从网上下载的SCL编程语言详解，可以在自己练习的基础上更加深入。
The detailed explanation of SCL programming language downloaded from the Internet can be more in-depth on the basis of their own practice. (2020-04-17, PLC, 921KB, 下载8次)
应用西门子1500PLC，控制有线及无线网络，与若干台1200PLC，ET200PLC完成组网及信号收发。
Application Siemens 1500PLC, control wire and wireless network, and several 1200PLC, ET200PLC complete networking and signal transmission and reception. (2019-02-23, PLC, 5810KB, 下载8次)
S7-400 CPU之基于以太网通讯，通过PLCSIM仿真
S7-400 CPU communication (2017-09-15, PLC, 1263KB, 下载6次)