介绍了西门子plc如何使用，软件界面，软件编程，梯形图使用
How to use Siemens PLC is introduced (2021-03-18, PLC, 2978KB, 下载2次)
以触摸屏作为人机交互的媒介，可编程逻辑控制器（PLC）作为主控单元，结合多种传感器和执行机构，设计了一套能自动和手动处理评价处理后污水装置的自动控制系统
With touch screen as the medium of human-computer interaction, PLC as the main control unit, combined with a variety of sensors and actuators, an automatic control system which can automatically and manually treat and evaluate the treated sewage device is designed (2020-05-04, PLC, 49KB, 下载1次)
S7-200 自由口通讯资料 编程说明资料,能详细了解相关通讯格式
S7-200 free port communication data (2017-11-27, PLC, 598KB, 下载2次)