Effects Of Protection Levels - Siemens S7-400 Equipment Manual

Change from RUN to STOP:
The CP changes to STOP (transitional phase with LED display "Stopping").
The reaction is as follows in STOP:
• Established connections (ISO transport, ISOonTCP, TCP, UDP connections) are terminated.
• The following the functions are disabled:
– Time-of-day synchronization
– PROFINET IO
• The following functions remain enabled:
– The configuration and diagnostics of the CP (system connections for configuration,
– Web diagnostics
– FTP / FTPS access to the file system
– HTTP / HTTPS access
– Routing function
6.3

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.
• Formatting the C-PLUG
Note the additional restriction if a protection level of the CPU is enabled.
• Loading firmware using the NCM Firmware Loader
Further restrictions on access to the CP result from configuring a protection level for the CPU.
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
diagnostics, and PG channel routing are retained).
Configuration and operation
6.3 Effects of protection levels
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