Hello, I think that online and offline signatures are different, anyway check this :

https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwjQjpLtjZ7MAhXD0xQKHaWBBFEQFggrMAI&url=https%3A%2F%2Fwww.automation.siemens.com%2Fsalesmaterial-as%2Finteractive-manuals%2Fgetting-started_simatic-s7-1500%2Fdocuments%2FEN%2Fsafety_en.pdf&usg=AFQjCNG6EdzaNDwn1lUES5j-KKsurl_qUw&sig2=MIvvignyVf0aqoHg7L56oA

And see in particular the signature paragraph , good luck

Taganini

I use TIA Portal v13 SP1 Update 8 to go online with a CPU1513F, where I have a project that wasn't created originally in my laptop, and every time I make any change on one of the standard blocks, and download to the PLC, it will also change the Safety Administration, and will show  the Offline Safety program status as inconsistent. Any tips would be appreciated. Thanks!

 Dear Taganini,

which standard-block did you change?
Are there any standard-DBs, which are referenced in your safety-program?

Best regards,
yy1

New question published by Iweinclaerhout is split to a separate thread with the subject Safety DB like F_GlobalDB available in TIA Portal?.

Best regards
The Helping Hand