Simatic S7 Can Opener is a third-party software utility designed to bypass the "KNOW_HOW_PROTECT" attribute on Siemens SIMATIC S7-300 and S7-400 PLC blocks . While the current official version from is v2.0, version
No Source Reconstruction: For blocks written in SCL, CFC, GRAPH7, or HiGraph, unlocking will only reveal the compiled STL code; it cannot regenerate the original high-level source file. Simatic S7 Can Opener V1.31 33
Introduced a revised registration scheme and minor stability improvements. Current Status: Simatic S7 Can Opener is a third-party software
Comment Retention: If the original block contained comments, the tool preserves them after unlocking so you can understand the logic. Simatic S7 Can Opener V1.31 33