SEW-Eurodrive ECDriveS ECC-DFC - Definition of the ECC-DFC Ethernet

Auto configuration of the linear conveyor
Manual – ECC-DFC field bus controller
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7.3. Definition of the ECC-DFC Ethernet
INFORMATION
Important basic information about understanding IP addresses in the Ethernet
network and subnetwork terms can be found in “Appendix B – Configuring the
PC for Ethernet subnetworks”. The description in this section assumes that you
have general knowledge of IP addresses and subnetworks.
All fieldbus control modules communicate via the Ethernet network and use
TCP/IP-based protocols for normal operation. In order to work correctly, all
TCP/IP protocols assume that a unique IP address is assigned to every device in
the network.
An IP address has the following format: AAA.BBB.CCC.DDD, whereby AAA,
BBB, CCC, and DDD are numeric values between 0 and 255.
In the case of ECC-DFC, the AAA.BBB.CCC part of the IP address is defined as
the subnetwork (subnet). The DDD value is referred to as the node.
If, for example, a fieldbus controller module has the IP address “192.168.25.20”,
its subnetwork address is “192.168.25” and its node is “20”.
A temporary IP address is allocated to each ECC-DFC in the factory, which is
used by the automatic testing equipment so that each fieldbus controller module
can be tested prior to shipping. When a module is removed from its packaging,
this IP address is still stored in it.
When the auto configuration procedure starts, a new IP address is automatically
assigned to each module. For all modules, this IP address is determined by the
subnetwork of the IP address that is already stored in the module that is chosen
as the auto configuration master.
Regardless of whether all modules downstream of the auto configuration master
have the same or different subnetwork or node values, their subnetwork is
changed to that of the auto configuration master.
Furthermore, during the auto configuration procedure, the node value of the con-
figuration master is changed to 20. All downstream modules of the fieldbus con-
troller are then automatically given a node value starting with 21.