Beckhoff EK15 Series Documentation page 41

Settings EtherCAT device
System and infrastructure devices such as EK1100 or EK1122 couplers and junction etc. do not require
Distributed Clocks to function properly. Nevertheless, it may be topologically expedient to designate the first
coupler in an EtherCAT system as reference clock, for example. For this reason, from a certain level the
infrastructure components are able to operate as reference clocks, based on special configuration settings.
According to the following table (DC support from rev/firmware version), the components support activation
of distributed clocks:
Device
BK1150
CU1128
EK1100
EK1101
EK1501
EK1501-0010
EK1122
EK1521
EK1541
EK1561
EK1521-0010
EK1814
To ensure that TwinCAT uses such a component as DC reference clock, a manual intervention during the
configuration setup is required, as shown here using the EK1100 as an example.
The checkboxes "Cyclic Mode Enable" and "Use as potential Reference Clock" must be set.
EK1122, EK15xx
XML revision in the configura-
tion
from BK1150-0000-0016
from CU1128-0000-0000
from EK1100-0000-0017
from EK1101-0000-0017
from EK1501-0000-0017
from EK1501-0010-0017
from EK1122-0000-0017
from EK1521-0000-0018
from EK1541-0000-0016
from EK1561-0000-0016
from EK1521-0010-0018
from EK1814-0000-0016
Version: 3.4
Serial number of the component
from firmware 01: xxxx01yy
from firmware 00: xxxx00yy
from firmware 06: xxxx06yy
from firmware 01: xxxx01yy
from firmware 01: xxxx01yy
from firmware 02: xxxx02yy
from firmware 01: xxxx02yy
from firmware 03: xxxx03yy
from firmware 01: xxxx01yy
from firmware 01: xxxx01yy
from firmware 03: xxxx03yy
from firmware 00: xxxx00yy
Basics
41