The previous page is sending you to https://support.automation.siemens.com/CN/llisapi.dll/csfetch/2201072/step7_s7_f_fh_systems_operating_manual_en-US_en-US.pdf?func=cslib.csFetch&nodeid=6359901&forcedownload=true.

 If you do not want to visit that page, you can return to the previous page.