Siemens S7-1200 - Page 191

Programming concepts
6.6 Protection
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
191
Security level
Access restrictions
HMI access Allows HMI access and all forms of PLC-to-PLC communications without password protection.
Password is required for reading the data in the CPU, for modifying (writing to) the CPU, and for
changing the CPU mode (RUN/STOP).
No access (complete
protection)
Allows no access without password protection.
Password is required for HMI access, reading the data in the CPU, for modifying (writing to) the
CPU, and for changing the CPU mode (RUN/STOP)
Passwords are case-sensitive. To configure the protection level and passwords, follow these
steps:
1. In the "Device configuration", select the CPU.
2. In the inspector window, select the "Properties" tab.
3. Select the "Protection" property to select the protection level and to enter passwords.