Fig. 41 Appending Further Ethercat Slaves - Beckhoff CU2508 Documentation

Commissioning
Fig. 41: Appending further EtherCAT slaves
Distributed Clocks settings
All CU2508 downlink ports are synchronized with each other and can appear as ReferenceClock in the
respective EtherCAT strand. In the default setting, however, the CU2508 port is not marked as Distributed-
Clocks-capable, hence under TwinCAT the next subsequent Distributed-Clocks-capable slave is selected as
st
the ReferenceClock. In each case the CU2508 port is the 1 slave in the respective strand.
Fig. 42: EtherCAT Distributed Clocks reference
If the CU2508 port is to be used as the ReferenceClock in a system, the setting "Use as potential
ReferenceClock" must be changed; see fig. CU2508 slave - Distributed Clocks setting.
Fig. 43: CU2508 slave - Distributed Clocks setting
Real-time Ethernet port multiplier Version: 2.6 35