Options" Tab: Effects Of Protection Levels - Siemens SIMATIC S7-400 Operating Instructions Manual

Configuration and operation
4.7 Configuration of the CP in STEP 7 V5
"Security configuration"
If the security functions are enabled, further settings are possible.
● "Expanded NTP configuration"
Enable this option to be able to configure the security functions for time-of-day
synchronization.
● "Run..."
If you click the button, the SCT opens with the dialog box for NTP configuration. In this
dialog box, NTP servers already created in STEP 7 are displayed that can also be edited
there. You can also create and configure NTP servers of the type NTP (secure).
For details, see section Configuration in the SCT (Page 55).
4.7.7

"Options" tab: Effects of protection levels

Module access protection on the CP
With this option, you can protect the CP from accidental or unauthorized access. The
following options can be selected in the drop-down list:
● Not locked
● Status-dependent
In this setting read access for diagnostic purposes is possible.
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
– 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
If you have configured the setting of the IP addresses of the CP from a DHCP server, you
cannot assign an IP address to the CP with the Primary Setup Tool (PST).
52
Note the additional restriction if a protection level of the CPU is enabled.
Operating Instructions, 01/2017, C79000-G8976-C427-02
CP 443-1 OPC UA