Siemens 6AV6651-7KA01-3AA4 - S7-1200 + KTP400 Basic Starter Kit 6AV6651-7KA01-3AA4 Benutzerhandbuch
Produktcode
6AV6651-7KA01-3AA4
Easy to create the device configuration
5.7 Protecting access to the CPU or code block is easy
Easy Book
82
Manual, 03/2014, A5E02486774-AF
5.7
Protecting access to the CPU or code block is easy
The CPU provides four levels of security for restricting access to specific functions. When
you configure the security level and password for a CPU, you limit the functions and memory
areas that can be accessed without entering a password.
Each level allows certain functions to be accessible without a password. The default
Each level allows certain functions to be accessible without a password. The default
condition for the CPU is to have no restriction and no password-protection. To restrict access
to a CPU, you configure the properties of the CPU and enter the password.
Entering the password over a network does not compromise the password protection for the
Entering the password over a network does not compromise the password protection for the
CPU. Password protection does not apply to the execution of user program instructions
including communication functions. Entering the correct password provides access to all of
the functions at that level.
PLC-to-PLC communications (using communication instructions in the code blocks) are not
PLC-to-PLC communications (using communication instructions in the code blocks) are not
restricted by the security level in the CPU.
Table 5- 4
Security levels for the CPU
Security level
Access restrictions
Full access (no
protection)
Allows full access without password protection.
Read access
Allows HMI access and all forms of PLC-to-PLC communications without password protection.
Password is required for modifying (writing to) the CPU and for changing the CPU mode
Password is required for modifying (writing to) the CPU and for changing the CPU mode
(RUN/STOP).
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
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
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.
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.