Security Levels; Table 5-3 Levels Of Protection Of A Cpu - Siemens SIMATIC S7-400H System Manual

Installation of a CPU 41x–H

5.5 Security levels

5.5 Security levels
You can define a security level for your project in order to prevent unauthorized access to
the CPU programs. The objective of these security settings is to grant a user access to
specific programming device functions which are not protected by password, and to allow
that user to execute those functions on the CPU. When logged on with password, the user
may execute all PG functions.
Setting security levels
You can set the CPU security levels 1 to 3 in STEP 7 under "Configure Hardware".
If you do not know the password, you can clear the security setting by means of a manual
CPU memory reset using the mode selector switch. The CPU must not contain a Flash card
when you perform such an operation.
The following table lists the levels of protection of an S7–400 CPU.
Table 5-3
CPU function
Block list display
Monitoring tags
Module status STACKS
Operator control and monitoring
functions
S7 communication
Reading the time
Setting the time
Status block
Upload to PG
Download to CPU
Deleting blocks
Compressing memory
Download user program to
memory card
Controlling selection
Controlling tags
Breakpoint
Clear breakpoint
CPU memory reset
Force
Updating the firmware without
a memory card
Setting the security class with SFC 109 "PROTECT"
SFC 109 "PROTECT" is used to switch between security classes 1 and 2.
50
Levels of protection of a CPU
Level of protection 1 Level of protection 2 Level of protection 3
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted
Access granted Access granted
Access granted Access granted
Access granted Access granted
Access granted Access granted
Access granted Access granted
Access granted Access granted
Access granted Access granted
Access granted Password required
Access granted Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
Password required Password required
System Manual, 09/2007, A5E00267695-03
S7-400H