Hi,

I don´t know something like Block Privacy  in TIA.

Please check this:

What block protection facilities are available in STEP 7 to protect the know-how of your blocks?

Regards,

Towome

know how will prevent access to code (interface can be seen)

also you can copy-protect (bind block to memory card serial number)

and if you want block to be read/only (but code visible) you can set a password for modification as well.