Omron CJ1W-EIP21 用户手册

When the EtherNet/IP Unit or built-in EtherNet/IP port has a private address,
communications applications can be used under the following conditions:

■

• The FINS communications service can be executed on the intranet

between EtherNet/IP Units and built-in EtherNet/IP ports with private
addresses only.
A device such as a personal computer (with a FINS application, including
the CX-Programmer) cannot connect online and communicate over the
Internet with an EtherNet/IP Unit or built-in EtherNet/IP port that has a pri-
vate address. FINS communications are also not possible over the Inter-
net between EtherNet/IP Units and or built-in EtherNet/IP ports with
private addresses.

• Either FINS/TCP or FINS/UDP can be used for the FINS communications

service.

• With FINS/UDP, all of the EtherNet/IP Unit or built-in EtherNet/IP port IP

address conversion methods can be used.

 

Intranet

FINS/TCP client computer 
with CX-Programmer, etc. 

Firewall

IP router

Ethernet (EtherNet/IP)

PLC

Communications in intranet

EtherNet/IP Unit: Private address

FINS communications,
Explicit messages

FINS communications,
Explicit messages

Internet

Intranet

IP router

Firewall

Communications in Intranet

FINS/TCP client computer 
with CX-Programmer, etc.
or
CIP client computer with 
Network Configurator, etc.

Ethernet (EtherNet/IP)

PLC

PLC

Communications 
in Intranet

EtherNet/IP Unit: Private address

EtherNet/IP Unit: Private address

or 
CIP client computer with 
Network Configurator, etc.