Do NOT format the card via Windows, and do NOT delete hidden system files like __LOG__ or crdinfo.bin . Deleting these will permanently damage the card. Reinsert the card into the CPU and power it back on.
What or TIA Portal version are you working with? Share public link
Forgotten or lost passwords for a Siemens SIMATIC S7-1500 PLC Go to product viewer dialog for this item.
If the machine was built by a third-party integrator, you must request the unprotected block or password directly from them. Best Practices to Prevent Future Lockouts siemens s7-1500 password reset
A critical technical detail for your planning: In manual version 14.14, it states: "The password for protection of confidential configuration data is retained after the CPU is reset to factory settings". Therefore, if you only need to clear the configuration password, you must look for the specific check-box option Delete password for protection of confidential PLC configuration data in STEP 7's online tools. Other protection types may require different, sometimes more destructive, methods.
The absolute fastest and most reliable way to reset an S7-1500 PLC password is to clear the SIMATIC Memory Card (SMC). The S7-1500 stores its entire configuration, including security parameters and passwords, directly on this card. Requirements A standard SD card reader. A computer running Windows.
For completeness, it's worth knowing that Siemens has an official mechanism for setting or resetting a password using the memory card. This method, known as the SET_PWD.S7S job, is intended for password management when you have the password, or to set a new password on a factory-fresh CPU. Do NOT format the card via Windows, and
Do NOT delete hidden files like __LOG__ or crdinfo.bin , as these make the card recognizable to the PLC.
Option 2: Factory Reset via TIA Portal (If Connection is Possible)
Industrial automation relies heavily on the security and integrity of programmable logic controllers (PLCs). The Siemens SIMATIC S7-1500 is a flagship controller used globally in critical infrastructure and manufacturing. What or TIA Portal version are you working with
This encryption locks individual blocks (FCs, FBs) within the program. A hardware reset will not recover this code if you do not possess the original source project files.
Select the option to "Retain IP address" if you want to keep communication settings, or "Reset IP address" for a full wipe.
Store all PLC passwords in an enterprise-grade, encrypted password manager accessible to the automation engineering team.
This comprehensive guide covers every available method to reset, bypass, or clear passwords on an S7-1500 PLC, detailed step-by-step for automation engineers. The Reality of S7-1500 Security