Omron NJ101-10 Series, User Manual

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3-1-3
Types of EtherCAT Variables
There are three types of EtherCAT variables as listed below.
Variable type Description
Allocated var-
iables Device varia-
bles These are common in-out variables for EtherCAT slaves. You can change the
names of these variables.
EtherCAT
Slave configuration
EtherCAT
slave
EtherCAT
slave
EtherCAT
slave
Special Unit Special Unit B
a
s
ic
I
/O
U
n
it
B
a
s
ic
I
/O
U
n
it
E
th
e
rC
A
T
m
a
s
te
r
CPU Unit
Device variables for I/O
ports
Axis Varia-
bles These are structure variables for I/O and parameters for Servo Drive and en-
coder input slaves.
You can change the names of these variables.
EtherCAT
Servo Drive
Servo Drive
E
th
e
rC
A
T
m
a
s
te
r
EtherCAT
slave
Allocated. Allocated.
Axis Variable A
Axis Variable B
CPU Unit
System-de-
fined varia-
bles System-de-
fined varia-
bles for
EtherCAT
master These variables are defined by the system for communications parameters,
communication status, and other functions. You cannot change the names of
these variables.
3 EtherCAT Communications
3-6
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)