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109
Private and Global Addresses
Section 5-3
5-3-3
EtherNet/IP Unit with a Global Address
Conditions for Using
Communications
Applications
Communications applications can be used over the Internet under the follow-
ing conditions:
■
FINS Communications Service
• A device such as a personal computer (a FINS application, including the
CX-Programmer) can connect online and communicate over the Internet
with an EtherNet/IP Unit or built-in EtherNet/IP port that has a global
address.
• FINS/TCP is recommended as the FINS communications service
method.
FINS/TCP is more reliable than FINS/UDP in terms of communications
errors involving IP routers.
• The IP address table method is used as the IP address conversion
method of the EtherNet/IP Unit or built-in EtherNet/IP port.
• The TCP port number to be used for FINS/TCP cannot be used if prohib-
ited by a firewall in the communications path.
■
Explicit Message Communications Service
• A device such as a personal computer (a CIP application including the
Network Configurator) can connect online and communicate over the
Internet with an EtherNet/IP Unit or built-in EtherNet/IP port that has a
global address.
Intranet
FINS/TCP client computer
with CX-Programmer, etc.
or
CIP client computer with
Network Configurator, etc.
Ethernet (EtherNet/IP)
Communications
over Internet
Firewall
IP router
Internet
Global address
(required)
Intranet
IP router
Firewall
Private address
Global address
Communications
in intranet
Ethernet (EtherNet/IP)
PLC
EtherNet/IP Unit: Global address
Private address
Private address
Not output to Internet
Not output to Internet
Summary of Contents for CJ2H-CPU6 - REV 02-2010
Page 2: ......
Page 4: ...iv...
Page 6: ...vi...
Page 14: ...xiv...
Page 18: ...xviii...
Page 38: ...12 Network Configurator Overview Section 1 5...
Page 58: ...32 Selecting the Network Devices Section 2 3...
Page 116: ...90 Auxiliary Area Data Section 4 5...
Page 222: ...196 Message Communications Errors Section 7 6...
Page 364: ...338 Using the Backup Tool Section 13 3...
Page 402: ...376 CS CJ series Ethernet Unit Function Comparison Appendix A...
Page 404: ...378 Ethernet Network Parameters Appendix B...
Page 406: ...380 TCP Status Transitions Appendix C...
Page 452: ...426 Precautions for Using Windows XP Vista or Windows 7 Appendix G...
Page 460: ...434 Index...
Page 462: ...436 Revision History...
Page 463: ......