192.168.20.1 192.168.11.1
192.168.21.1
192.168.10.1
192.168.250.1
192.168.251.1
192.168.40.100
PC1
192.168.40.1
192.168.41.1
192.168.30.1
192.168.31.1
192.168.20.100 192.168.11.100
192.168.251.100
PC2 PC3
PC4
FTP client
FTP server
CPU Unit
Hub
Hub
NX-s
eries EtherNet/IP Unit
Unit No. 4 Unit No. 3 Unit No. 2 Unit No. 1
Port 1
Port 2
Hub Hub Hub
Port 1 Port 2 Port 2 Port 2 Port 2Port 1 Port 1 Port 1
IP Forward: Use
IP Forward: Use
The following settings are required for this configuration.
FTP communica-
tions mode
Setting
Active Mode
• Set IP Forward in Port Forward to
Use for both the CPU Unit and the NX-series Ether-
Net/IP Unit.
• PC1, which is the FTP client, is set to Active Mode.
• Set TCP/UDP Port Transfer of the NX-series EtherNet/IP Unit with unit number 4 con-
nected to PC1 as follows.
Port: Port1
Protocol: TCP
Port Number: 21
Passive Mode Not applicable
8-5-3
Port Forward Between CPU Unit and NX-series EtherNet/IP Unit
or Between EtherNet/IP Ports on NX-series EtherNet/IP Unit
s
The port forward can be performed between the built-in EtherNet/IP port on the CPU Unit and the
EtherNet/IP port on the NX-series EtherNet/IP Unit or between multiple
NX-series EtherNet/IP Units.
If the network addresses of the Units are duplicated, the IP router table settings are required. If there
are no duplicates, no IP router table settings are required.
The following figure shows communications between PC2 and PC3 and between PC3 and PC4.
In this case, PC2 needs to make route settings to PC3 192.168.11.100. Similarly, PC3 needs to make
route settings to PC2 192.168.20.100 and PC4 192.168.251.100, and PC4 needs to make route set-
tings to PC3 192.168.11.100.
8 TCP/IP Functions
8-24
NX-series EtherNet/IP Unit User's Manual (W627)
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