Omron CJ1W- ECT21

1 - 7
1 Features and System Configuration
CJ-series EtherCAT Slave Units Operation Manual (W541)
1-3 System Configuration of
CJ-series EtherCAT Slave Unit
1
1-3 System Configuration of CJ-series
EtherCAT Slave Unit
An example of a system configuration for a CJ-series EtherCAT Slave Unit is shown below.
Letter Item Description
(A)
EtherCAT master
*1
The EtherCAT master manages the EtherCAT network, monitors the status
of the slaves and exchanges I/O data with the slaves.
(B) CJ-series Ether-
CAT Slave Unit
(CJ1W-ECT21)
The CJ-series EtherCAT Slave Unit can perform the following functions
over an EtherCAT network.
• Process data communications with the EtherCAT master.
• Message communications (SDO communications) with the EtherCAT
master.
• Exchange data between the CJ-series CPU Unit and the EtherCAT mas-
ter.
(C) CJ-series CPU
Unit
*2
The main Unit that controls a CJ-series PLC. The CPU Unit refreshes I/O
for other Units and slaves, etc.
(D)
CX-Programmer
*3
The CX-Programmer runs on a personal computer and it is used to config-
ure I/O Communication Area Setting Table to communicate between the
CJ-series CPU Unit and the EtherCAT Slave Unit and to program, monitor,
and debug the CJ-series PLC.
(A) EtherCAT master
(E) Communications cable
Ethernet cables
(G) Configuration Software
(D) CX-Programmer
(F) ESI files
Built-in EtherCAT port
.xml
(B) CJ-series
EtherCAT Slave Unit
CJ1W-ECT21
(C) CJ-series
CPU Unit
Input port
Output port