siemens s7 PID FB1 protected

I'm having a problem with a PID controled valve.

At one time they call FB1 (PID) and there are several inputs and outputs
I want to open FB1 to get some information about how it works but it cant be opened cause it is protected !
What can i do do get information about de FB ?

Which PID Block are you using? I can't find any Siemens block either FB1 or PID in the Standard Library.

If it's a Siemens Block which has just been renamed, you can get all the info you need to use it by highlighting it and pressing the "F1" key.

If it's not a Siemens Block and your equipment supplier has included his own special PID Block, then if the same procedure doesn't work you'll need to contact your supplier for the information.