Download the ZIP file from the Siemens Support Portal and extract the .xml and image files. TIA Portal Installation:
Go to > Manage general station description files (GSD) . 6es7 155-6au01-0bn0 v4.2 gsd download
Select the source path where you extracted the files and click . STEP 7 Classic Installation: Open HW Config . Download the ZIP file from the Siemens Support