Appendices
A - 38
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
The EtherNet/IP Couple Unit supports a TCP/UDP message service based on the following specifica-
tions.
5
Setting the EtherNet/IP Cou-
pler’s IP Address, Automatic 
Clock and Port Number.
Set the IP address of the EtherNet/IP Coupler Unit with 
the Network Configurator.
You can also use the switch settings to set the IP 
address. Refer to 9-4 Setting IP Address on page 9-31.
Set the Automatic Clock with the Network Configurator.
Set the Port Number with the Network Configurator.
• 9-4 Setting IP 
Address on page 9-31
• 11-3-3 Automatic 
Clock Adjustment on 
page 11-11
• A-2-5 TCP/IP and 
UDP/IP Port Number 
Setting on page A-41
6
Checking Indi-
cators
Ethernet Unit Check the following indicators on the Ethernet Unit. The 
following example is for a CJ-series Ethernet Unit.
• RUN
•100M
•ERC
•ERH
•SD
•RD
•LNK
•TCP
•FTP
•HOST
Ethernet Units Opera-
tion Manual Construc-
tion of Networks (Cat. 
No. W420).
EtherNet/IP 
Coupler Unit
Check the following indicators on the EtherNet/IP Cou-
pler Unit.
•MS
•NS
•TS
• L/A P1
• L/A P2
• UNIT PWR
•I/O PWR
• 4-2 Indicators on 
page 4-5
• 12-2 Checking for 
Errors and Trouble-
shooting with the Indi-
cators on page 12-3
7
Confirming Operation by Check-
ing the Wiring
Check the wiring by monitoring inputs or using forced 
outputs.
• Manual for the Con-
troller
• Manual for the spe-
cific NX Units
8
Creating and Confirming Opera-
tion of TCP/UDP Socket Commu-
nications Program with the 
TCP/UDP Message Service
Write the user program for TCP/IP or UDP/IP communi-
cations with message services.
Manual for the Control-
ler
A-2-4 TCP/UDP Message Service Specifications
Item Specification
Maximum number of 
simultaneously con-
nectable clients
8 
Maximum message 
size
Request: 492 bytes
Response: 496 bytes
Procedure Item Description Reference