这个里面有西门子自制的SCL文件库(很多),可以下载学习用。
https://support.industry.siemens.com/cs/document/87507915/%E5%9C%A8-step-7-(tia-%E5%8D%9A%E9%80%94)-%E4%B8%AD%EF%BC%8C%E5%A6%82%E4%BD%95%E5%88%9B%E5%BB%BA%E4%B8%80%E4%B8%AA%E4%B8%8D%E4%BE%9D%E8%B5%96%E4%BA%8E%E7%A1%AC%E4%BB%B6%E7%9A%84%E9%A2%91%E7%8E%87%E5%8F%AF%E8%B0%83%E7%9A%84?dti=0&lc=zh-CN