Precautions for Correct Use
When you use a system configuration in which an EtherCAT Junction Slave is connected to the
EtherCAT master to synchronize between synced slaves, you need a EtherCAT master or slave
that can provide a reference clock.
With the NX-series CPU Unit, the EtherCAT master provides a reference clock.
With the NJ-series CPU Unit, at least one of the following two conditions must be met because
the EtherCAT master does not provide a reference clock.
• A slave that provides a reference clock must be connected between the EtherCAT master
and the first EtherCAT Junction Slave.
• The EtherCAT Junction Slave must provide a reference clock.
However, the above conditions do not apply when synchronization is not performed between
synced slaves in the entire EtherCAT network.
You can determine whether the EtherCAT Junction Slave supports a reference clock from the
Reference Clock
in the slave settings on the Sysmac Studio.
OMRON EtherCAT Junction Slaves support a reference clock.
Precautions for Correct Use
For project unit version 1.40 or later, check that the EtherCAT Junction Slave ports actually con-
nected to slaves agree with the ports of the network configuration information on the Sysmac
Studio. If the ports do not agree, a communications error occurs. You can perform the compare
and merge operation in the Sysmac Studio to check whether the ports agree.
For project unit version earlier than 1.40, an error does not occur and the CPU Unit can contin-
ue the communications even when the EtherCAT Junction Slave ports actually connected to
slaves do not agree with the ports of the network configuration information on the Sysmac Stu-
dio.
4 EtherCAT Network Wiring
4-11
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
4-1 Supported Network T
opologies
4
4-1-4
Precautions for Using Junction Slaves
Summary of Contents for NJ101-10 Series
Page 10: ...Manual Structure 8 NJ NX series CPU Unit Built in EtherCAT Port User s Manual W505...
Page 80: ...3 EtherCAT Communications 3 12 NJ NX series CPU Unit Built in EtherCAT Port User s Manual W505...
Page 236: ...9 Troubleshooting 9 38 NJ NX series CPU Unit Built in EtherCAT Port User s Manual W505...
Page 274: ...Appendices A 38 NJ NX series CPU Unit Built in EtherCAT Port User s Manual W505...
Page 275: ...I Index I 1 NJ NX series CPU Unit Built in EtherCAT Port User s Manual W505 I...
Page 279: ......