S7 CanOpener is a third-party utility designed to remove the know_how_protect attribute from SIMATIC S7 program blocks www.runmode.com . While originally developed for the classic STEP 7 v5.x
: Newer controllers like the S7-1200 and S7-1500 utilize User Management & Access Control (UMAC) to define specific roles and rights for each CPU, adding layers of security beyond simple block passwords. Project Research
The primary document you are looking for is the . While I cannot provide a copyrighted PDF download directly, here is a summary of the technical details usually found in the "S7 Can Opener for TIA Portal" documentation: