Omron CS1W-ETN21 operation manual 108

Private and Global Addresses Section 5-3

Intranet

IP router

Firewall

Intranet

Firewall

IP router

Internet

Global address

Private address

Ethernet

Personal computer, CX-Programmer, etc.

Ethernet

PLC

Private address

Global address (required)

Personal computer,

CX-Programmer, etc.

Private address

Not output to Internet

Not output to Internet

Private address

PLC	PLC
Private address	Private address

Communications Services That Require Global Addresses for Ethernet Units

A global address is required for the Ethernet Unit's IP address when the fol- lowing communications services are used over the Internet.

•FINS communications services

•File transfers

•Socket services

When mail is sent or received over the Internet, the Unit's IP address can be a private address.

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