Beckhoff EtherCAT EK112 Series Manual page 87

Basics
The TwinCAT online topology shows the wiring scheme, see Fig. Online Topology. The EK1122 is selected,
so that further information is shown. The green bars above the slaves indicate the correct RUN state in all
slaves.
Fig. 64: Online topology
An error is now generated by disconnecting the connection between the upper RJ45 socket (X1) and the
EL3102 device. Within a few µs the ESC in the EK1122 detects the lost link and automatically closes the
affected port. This has the effect that the next incoming EtherCAT telegram is immediately forwarded to port
D (port 3) and the EL4732. The link is thus missing here and the System Manager marks this in the online
display; see following Fig. Example configuration with interrupted cable.
EK112x, EK15xx Version: 3.6 87