Siemens SIMATIC S7-1200 / S7-1500 PLC (Embedded Web Server) — Default Password
Default username and password for the Siemens SIMATIC S7-1200 / S7-1500 PLC (Embedded Web Server): admin / (blank). Learn how to log in and how to change the default credentials.
The S7-1200 and S7-1500 CPUs include an optional embedded HTTP/HTTPS web server configurable in TIA Portal. When the web server is enabled, the default admin account has a blank password. This is the same default across all S7-1200 and S7-1500 hardware variants. Communication with S7-1200/1500 PLCs over PROFINET/S7 protocol also requires no password on firmware prior to V4.
| Username | Password | Access | Notes |
|---|---|---|---|
admin | (blank / none) | Web UI | Default when the embedded web server is enabled in TIA Portal hardware configuration |
- Source
- vendor documentation
Responsible use
This database lists publicly documented default credentials so administrators can find and change them. Only use these on systems you own or are authorized to test.