Operation
7.6 Communication via PROFINET IO
SINAMICS DCP
250 Operating Instructions, 09/2019, A5E34382853K
Device name (NameOfStation)
When it is shipped, an IO device does not have a device name. An IO device can only be
addressed by an IO controller, for example, for the transfer of project engineering data
(including the IP address) during startup or for user data exchange in cyclic operation, after it
has been assigned a device name with the IO supervisor.
Note
The device name must be stored retenti
vely either with STARTER or with HW Config of
7.
Note
You can enter the address data for the ports of the optional CBE20 module in STARTER in
the expert list using parameters p8940, p8941, p8942 and p8943.
Replacing the Control Unit (CUD) (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.
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. The memory card allows a module
to be replaced without an IO supervisor when a fault occurs in a PROFINET device.
7.6.1.3 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 togethe
r 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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