Using A Private Address For The Ethernet/Ip Unit - Omron CJ1W-EIP21 Operation Manuals

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Using a Private Address for the EtherNet/IP Unit

● Intranet
IP router
Firewall
EtherNet/IP Unit: Private address
 Conditions for Communications Applications
If the EtherNet/IP Unit uses a private address, you can use explicit message communications ser-
vice under the following conditions.
• The explicit message communications service can be executed on the intranet between Ether-
Net/IP Units 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 an EtherNet/IP Unit that has a private
address. Explicit message communications are also not possible over the Internet between Ether-
Net/IP Units with private addresses.
Precautions for Correct Use Precautions 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.
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
● Intranet
CIP client on a
computer, such as
Sysmac Studio or
Network Configurator
Firewall
IP router
EtherNet/IP Unit: Private address
● Internet
CIP client on a computer,
such as Sysmac Studio
or Network Configurator
Communications in intranet
Ethernet (EtherNet/IP)
Controller
Communications in
intranet
EtherNet/IP Unit: Private address
4 Determining IP Addresses
Explicit message
Ethernet (EtherNet/IP)
Communications in
intranet
Controller
Explicit message
Controller
4
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