Omron CJ2 User Manual page 196

6 Troubleshooting
Connecting via the EtherNet/IP port
The CX-Programmer
cannot connect.
Is the Ethernet cable
securely connected?
Is a switching hub
used between the
personal computer
and the PLC?
Are unique IP
addresses used for the
personal computer and
the CPU Unit, and are
they set for the same
domain?
Is the
CX-Programmer
network type set to
EtherNet/IP?
Replace the Ethernet cable
and the switching hub.
6-30
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
No
switching hub) and that the 100M (10M)
indicator lights at the CPU Unit.
Use the ping command from the personal
Yes
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).
No
No
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.
Yes
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).
No
Yes
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.
No
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).
No
Yes
Set the CX-Programmer network
type to EtherNet/IP.
No
No
Can the
Yes
CX-Programmer be
connected online?
Can the
Yes
CX-Programmer
be connected
online?
Can the
Yes
CX-Programmer be
connected online?
Can the
Yes
CX-Programmer be
connected online?
End
CJ2 CPU Unit Hardware User's Manual