Ethernet Interface" Parameter Group - Siemens SIMATIC S7-400 Operating Instructions Manual

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 write or read protection for the CPU ("Protection" parameter group) , 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).
● 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.
4.8.2

"Ethernet interface" parameter group

Configure the Ethernet interface as usual.
Advanced options
● Use IEC V2.2 LLDP mode
If the option is enabled, the device uses LLDP in the IEC version V2.2 (PROFINET V2.2).
Although the device supports a higher version of the protocol, you can make this setting
for reasons of compatibility with other parts of the plant.
● Keepalive connection monitoring
With this option, you monitor the connection to the communications partner.
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
Note the additional restriction if a protection level of the CPU is enabled.
4.8 Configuration of the CP in STEP 7 Professional
Configuration and operation
61