BECKHOFF EP9128 - Manual (Page 21)

Basic functioin principles
Fig. 17: Setting the PreviousPort for an EP box
In the Fig. above the box 6 successor is set up at port 5, which means the PreviousPort selection of the
EP3744 shows the free port D of ESC2 (B and D, see Fig. EP9128 diagram).
The internal connections in the EP9128 are E­bus connections, the 8 ports on the other hand are Ethernet,
see Fig. EP9128 diagram.
See also notes for configuration setup.
3.3 LED displays
EtherCAT
For each channel an LED indicates the current status (example port2).
Fig. 18: LED display per channel
LED Display
Link
Act off No connection
on Connection available (link)
flashing Data transfer (act)
EP9128 21 Version 2.1.0