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Siemens S7-1500 Password Reset (2027)

Siemens S7-1500 Password Reset (2027)

This solves the access issue, but you lose whatever logic was currently running on the locked CPU. If you do not have the source code, you have lost the intellectual property permanently.

In the Diagnostics window, expand the "Functions" folder. Look for "Reset to Factory Settings." (Note: If you do not see this option, you may not have sufficient access rights in TIA Portal, or the CPU is in a state preventing the reset).

If you can still connect to the PLC via "Accessible Devices" but do not have the protection password, you can use the function to wipe the CPU, including all passwords.

This solves the access issue, but you lose whatever logic was currently running on the locked CPU. If you do not have the source code, you have lost the intellectual property permanently.

In the Diagnostics window, expand the "Functions" folder. Look for "Reset to Factory Settings." (Note: If you do not see this option, you may not have sufficient access rights in TIA Portal, or the CPU is in a state preventing the reset).

If you can still connect to the PLC via "Accessible Devices" but do not have the protection password, you can use the function to wipe the CPU, including all passwords.

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