Dynamic Ip Address Assignment - Siemens SINAMICS S120 Series Function Manual

Communication via PROFINET IO
5.1 General information about PROFINET IO
Activating the interface configuration and saving it in non-volatile memory
To activate the interface configuration and save it in non-volatile memory, use the following
parameter settings:
● X127 Ethernet interfaces: p8905 = 2
● Internal PROFINET interfaces X150 P1 and P2: p8925 = 2
● Interfaces of the optional CBE20 module (X1400): p8945 = 2
Replacing the CU320-2 DP/PN and CU310-2 PN Control Units (IO device)
If the IP address and device name are stored in non-volatile memory, this data is also
forwarded with the memory card of the Control Unit. The memory card allows module
exchange without an IO supervisor when a fault occurs in a PROFINET device.
If a complete Control Unit needs to be replaced due to a device or module defect, the new
Control Unit automatically parameterizes and configures using the data on the memory card.
Following this, cyclic exchange of user data is restarted.
5.1.3

Dynamic IP address assignment

In those cases in which the PROFINET interface is not used for the IO communication, it is
possible to generate an IP address centrally using a DHCP (DHCP = Dynamic Host
Configuration Protocol) server. The following requirements must be satisfied to do this:
● At least one DHCP server must be active.
● The PG/PC and the SINAMICS devices must be connected to the same physical Ethernet
subnet.
Note
DHCP is not supported together with PROFINET. No cyclical connection is established for
an activated DHCP. It is therefore recommended that DHCP not be used within PROFINET
networks!
The DHCP address assignment can be set from the SIMATIC Manager or using SINAMICS
parameters.
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Function Manual, 12/2018, 6SL3097-5BD00-0BP0
Communication