Insert the empty, formatted memory card into the CPU. Power Up: Turn the power back on.
Open the front flap of the CPU and eject the SIMATIC Memory Card.
Search for accessible devices and connect to your S7-1500 CPU. Expand the menu. Click on Reset to factory settings . siemens s7-1500 password reset
This process is time-consuming and bureaucratic by design.
S7-1500 PLCs store the configuration, program, and security settings directly on the external SIMATIC Memory Card (SMC). If the CPU is locked, formatting or clearing this card removes the password restrictions. 🛑 Critical Rule: Do Not Use Windows Format Insert the empty, formatted memory card into the CPU
An Ethernet cable connecting your PC directly to the PLC network port. The CPU must be switched to mode. Step-by-Step Instructions Open TIA Portal (do not open a project).
The PLC will boot up with factory default settings and no password protection. You can now download your backup TIA Portal project. Method 2: Reset to Factory Settings via TIA Portal Search for accessible devices and connect to your
Blocks access to specific code blocks (FCs/FBs).
Navigate to and remove or change the password. Copy the unlocked block into your active project. Without a Backup
If you contact Siemens support, they will guide you through the physical "Reset password" process or request that you send the CPU to a certified service center with proof of purchase.
No. By design, know-how protection is meant to be irreversible without the original password. If you are the legal owner and have the source project, you can remove the protection there. If you do not have the source, the only way to remove a know-how protection block from the PLC is to delete it (and therefore the entire logic within it).