Omron NJ-series Connection Manual page 24

Right-click Node1 and select
5
Create Device Variable.
The variable names and
6
variable types are automatically
set.
Additional Information
The device variables are named automatically from a combination of the device names and
the port names.
The default device names are "E" followed by a serial number that starts from 001.
Additional Information
In this document, device variables are automatically named for a unit (a slave). Device
variables can also be manually named for I/O ports.
7．EtherCAT Connection Procedure
21