If you install STEP 7 (from V5.1) first, followed by one of the two COM PROFIBUS packages, a file will be overwritten which is required for special functions in STEP 7.

• 如果先安装STEP 7(自V5.；1版本起)随后安装两个COM PROFIBUS数据包中的一个，那么将会对STEP 7专用功能所需的一个文件执行重写操作。