Omron CJ2 User Manual

6 Troubleshooting
6-30
CJ2 CPU Unit Hardware User’s Manual
z Connecting via the EtherNet/IP port
The CX-Programmer
cannot connect.
Is the Ethernet cable
securely connected?
At the personal computer (or the
switching hub) and the CPU Unit, firmly
insert the cable until the connector
locks. Confirm that the LINK indicator
lights at the personal computer (or
switching hub) and that the 100M (10M)
indicator lights at the CPU Unit.
Use the ping command from the personal
computer to confirm that the communications
to the PLC have been established. For details,
refer to the EtherNet/IP Unit Operation Manual
(Cat. No. W465).
Can the
CX-Programmer be
connected online?
Is a switching hub
used between the
personal computer
and the PLC?
If a personal computer is connected to
a PLC using Straight Cable (or Cross
Cable), it can occasionally be difficult to
make the connection. If this occurs, try
using a switching hub between the
computer and PLC.
Use the ping command from the personal
computer to confirm that the communications
to the PLC is established. For details, refer to
the EtherNet/IP Unit Operation Manual (Cat.
No. W465).
Can the
CX-Programmer
be connected
online?
Are unique IP
addresses used for the
personal computer and
the CPU Unit, and are
they set for the same
domain?
Set the IP address for the personal
computer. Either use the default IP
address for the CPU Unit or else
connect the CX-Programmer and set
another IP address.
Use the ping command from the personal
computer to confirm that the communications
to the PLC has been established. For details,
refer to the EtherNet/IP Unit Operation Manual
(Cat. No. W465).
Can the
CX-Programmer be
connected online?
Is the
CX-Programmer
network type set to
EtherNet/IP?
Set the CX-Programmer network
type to EtherNet/IP.
Can the
CX-Programmer be
connected online?
Replace the Ethernet cable
and the switching hub.
No
Yes
End
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
No

Omron CJ2 Specifications

General

Model	CJ2
Manufacturer	Omron
Type	Programmable Logic Controller (PLC)
CPU Units	Multiple models available (e.g., CJ2M, CJ2H)
Number of I/O Points	Up to 2, 560 points
Communication Ports	Ethernet/IP, EtherCAT, USB, Serial
Expansion	Yes, via I/O Units and Special I/O Units
I/O Control Method	Cyclic Scan, Interrupt
Programming Language	Ladder diagram, structured text, function block diagram, sequential function chart, instruction list
Built-in I/O	Available on some models (e.g., CJ2M)
Ethernet Port	Yes, 1 port (depending on CPU Unit)
Serial Ports	RS-232C, RS-422/485 (configurable)
USB Port	Yes (for programming and monitoring)
Operating Temperature	0°C to 55°C
Storage Temperature	-25 to 70°C
Humidity	10 to 95% RH (non-condensing)
Vibration Resistance	10 to 57 Hz, Amplitude: 0.075 mm, 57 to 150 Hz, Acceleration: 1 G, X, Y, and Z directions, 80 min each
Power Supply Voltage	24 VDC or 100 to 240 VAC (depending on CPU Unit)