S7 CanOpener is a third-party utility designed to protected with the know_how_protect attribute. It is primarily used when original source code is lost or when a machinery supplier no longer supports their software, leaving system integrators with "read-only" blocks that cannot be troubleshot or modified.
Not all can openers are created equal. Based on community feedback, efficacy, and compatibility with TIA Portal (versions 13 to 19), here are the top contenders. s7 can opener tia portal top