STEP 7 Professional V11.0 SP2已经发布，现在可以下载它的系统手册了：
http://support.automation.siemens.com/CN/llisapi.dll?func=cslib.csinfo&nodeID0=4000024&lang=zh&siteid=cseus&aktprim=0&extranet=standard&viewreg=CN&objid=47071380&basisview=4000002&wttree=cs&treeLang=zh