Omron Sysmac NJ-series User Manual

4 Determining IP Addresses
4-14
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
 Conditions for Communications Applications
If the built-in EtherNet/IP port uses a private address, you can use explicit message communica-
tions service under the following conditions.
• The explicit message communications service can be executed on the intranet between built-in
EtherNet/IP ports with private addresses only.
• A device such as a personal computer (CIP applications including the Network Configurator) can-
not connect online and communicate over the Internet with a built-in EtherNet/IP port that has a
private address. Explicit message communications are also not possible over the Internet
between built-in EtherNet/IP ports with private addresses.
Precautions for Correct UsePrecautions for Correct Use
Network Security and Firewalls
To set up an intranet through a global address involves network security considerations. Be sure
to consult with a network specialist in advance and consider installation of a firewall. After a fire-
wall has been set up by a communications company technician, there may be some applications
that cannot be used. Be sure to check first with the communications company technician.
4-3-2 Using a Private Address for the Built-in EtherNet/IP Port
IP router
Ethernet (EtherNet/IP)
Controller
Controller
Ethernet (EtherNet/IP)
Built-in EtherNet/IP port: Private address
Built-in EtherNet/IP port: Private address
Communications in
intranet
Communications in intranet
Explicit message
CIP client on a computer,
such as Sysmac Studio
or Network Configurator
Firewall
Built-in EtherNet/IP port: Private address
Communications in intranet
IP router
Firewall
Explicit message
CIP client on a
computer, such as
Sysmac Studio or
Network Configurator
Controller
Internet
Intranet
Intranet

Omron Sysmac NJ-series Specifications

General

Brand	Omron
Model	Sysmac NJ-series
Category	Computer Hardware
Language	English