西门子官网STEP 7 Professional V11.0 SP2下载地址
http://support.automation.siemens.com/CN/llisapi.dll?func=cslib.csinfo&nodeid0=10805148&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=CN&objid=47071380&basisview=4000002&wttree=cs&treeLang=en

Enhancements of Service Pack 2
S7-1200:
Download without stopping the controller
Structured Text (SCL) as text language
Support of firmware V2.2 (entry ID 56640621)
Support of 64 bit operating systems - see details under System Requirements.
The STEP 7 V11 Service Pack 2 already includes all the changes of STEP 7 V11 SP1 incl. updates.

System Requirements
STEP 7 Professional / Basic V11 SP2 has been released for use under the following 32-bit operating systems:
Microsoft Windows XP Home SP3 (only STEP 7 Basic)
Microsoft Windows XP Professional SP3
Microsoft Windows 7 Home Premium (with or w/o SP1) (only STEP 7 Basic)
Microsoft Windows 7 Professional (with or w/o SP1)
Microsoft Windows 7 Enterprise (with or w/o SP1)
Microsoft Windows 7 Ultimate (with or w/o SP1)
Microsoft Windows 2003 Server R2 Standard Edition SP2 (only STEP 7 Professional)
Microsoft Windows Server 2008 Standard Edition SP2 (only STEP 7 Professional)
Furthermore, Service Pack 2 also supports the following 64-bit operating systems:

Microsoft Windows 7 Home Premium (with or w/o SP1) (only STEP 7 Basic)
Microsoft Windows 7 Professional (with or w/o SP1)
Microsoft Windows 7 Enterprise (with or w/o SP1)
Microsoft Windows 7 Ultimate SP1
Microsoft Windows Server 2008 Standard Edition R2 (with or w/o SP1) (only STEP 7 Professional)