Encrypts individual logic blocks (FCs or FBs) while keeping the overall CPU accessible. Official Recovery and Administrative Methods
Siemens patched this in later firmware versions (FW 3.x above). If your CPU is older, this method works in seconds. If it is new, it will fail.
This procedure works for most S7-300 CPUs and clears the working memory completely:
All methods discussed are intended for use on equipment you are legally authorized to work on. Ensure you have the owner's permission before proceeding.
Unlock S7300 Plc Password Work Fixed Link
Encrypts individual logic blocks (FCs or FBs) while keeping the overall CPU accessible. Official Recovery and Administrative Methods
Siemens patched this in later firmware versions (FW 3.x above). If your CPU is older, this method works in seconds. If it is new, it will fail.
This procedure works for most S7-300 CPUs and clears the working memory completely:
All methods discussed are intended for use on equipment you are legally authorized to work on. Ensure you have the owner's permission before proceeding.
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