Effects Of Protection Levels - Siemens SIMATIC NET S7-400 Manual

Configuration and operation

6.4 Effects of protection levels

6.4 Effects of protection levels
Module access protection on the CP
If you enable the protection level "Status dependent" in the CP configuration ("Options" tab),
the following actions are only possible when either the CPU or the CP is in the STOP state:
● Changing the operating status of the CP (RUN → STOP)
● Resetting / memory reset
Note the additional restriction if a protection level of the CPU is enabled.
● Loading firmware using the Firmware Loader.
Further restrictions on access to the CP result from configuring a protection level for the
CPU.
Protection levels of the CPU
If you configure a protection level ≥ 2 in the configuration of the CPU ("Options" tab), this has
the following effects on the operation of the CP:
● Initialization of the CP / assigning an IP address using a different method
Using the Primary Setup Tool (PST) you can only assign an IP address to the CP once.
● No PST with IP configuration using DHCP or in the user program
If you have configured the setting of the IP addresses of the CP from a DHCP server or
using the user program (IP_CONFIG), you cannot assign an IP address to the CP with
the Primary Setup Tool (PST).
● Resetting / memory reset
It is not possible to reset or to reset the memory of the CP.
Remove the protection level of the CPU to take this action.
● Downloading configuration data to the CP (EX11, GX11)
The following restriction applies only to the CP "EX11" and "GX11":
A change between data storage on the CPU and data storage on the CP is not possible.
Remove the protection level of the CPU to take this action.
48
CP 443-1 (EX30)
Manual, 03/2019, C79000-G8976-C255-05