Basics
EK110x, EK15xx
32
Version: 3.6
Fig. 16:
Internal and external port assignment for Bus Coupler EK1100 and EK1100-0008
Frame processing sequence
The EtherCAT frame arriving at the EtherCAT signal input is passed on by Port 0 (A) to the EtherCAT
processing unit.
• The EtherCAT frame arrives at Port 1 (B) and the data frame departs via Port 1 (B) to the following slave in
the EtherCAT terminal network (if a slave is connected there and reports ‘Link’).
• After the arrival of the data frame at Port 1 (B) from the terminal network, this is passed on to Port 2 (C) and
leaves the coupler at the following EtherCAT output (if a slave is connected there and reports ‘Link’).
• The data frame arrives at Port 2 (C). This is now forwarded to port 0 (A) and leaves the EK1100 /
EK1100-0008 via the EtherCAT input.
Note
Processing of the data
The data in the EtherCAT datagrams are processed only between Ports 0 (A) and 3 (D) in
the EtherCAT processing unit. The non-implemented (internal) Port 3 (D) is considered to
be closed and passes on the datagram to Port 1 (B).
