在Delivery Release for STEP 7 V14 SP1描述文件中有这么一段，亮点自己找

Compatibility with other products

STEP 7 Professional / Basic V14 SP1 works together with WinCC, Startdrive, SIMOCODE ES and SOFT STARTER ESV14 SP1 and SIMOTION SCOUT TIA V5.1 in a single framework.

STEP 7 Professional / Basic V14 SP1 (incl. WinCC Basic V14 SP1) can be installed on a PC in parallel with other versions of STEP 7 V11 to V13 SP2, STEP 7 V5.5 SP4 (STEP 7 V5.6), STEP 7 Micro/WIN V4.0 SP9, WinCC flexible 2008 SP3 and WinCC (from V7.2).

A project upgrade to TIA Portal V14 is performed exclusively on the basis of TIA Portal V13 SP1 projects (last update recommended). In order to provide you with the best possible support, the latest version of V13 SP2 is included with the V14 SP1 products. A compatibility mode is not supported.