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11-7

11 Programming Devices and Communications

CJ2 CPU Unit Software User’s Manual

11-1 Accessing a PLC from the CX-

Programmer

11-1-2 System Configurations for Accessible

PLCs

Precautions for Correct UsePrecautions for Correct Use

Precautions before Using EtherNet/IP Connections

Better firewall security for Windows XP (SP2 or higher) and Windows Vista has increased the

restrictions for data communications on Ethernet ports. When using an EtherNet/IP connection

to one of the following PLCs from an EtherNet port on a computer, you must change the settings

of the Windows Firewall to enable using CX-Programmer communications.

*1: An EtherNet/IP connection includes the following cases:

• An online connection with the network type set to EtherNet/IP

• An automatic online connection to a PLCs on an EtherNet/IP network when Auto Online - Eth-

erNet/IP Node Online is selected from the PLC Menu.

Refer to A-6 EtherNet/IP Connections from Windows XP (SP2 or Higher), Windows Vista, or

Windows 7 for operating procedures.

Additional Information

Routing tables must be created and transferred in the following cases.

If one or more FINS Network Communications Units* are connected to a CJ2 CPU Unit, it is nec-

essary to create and transfer the local network table of the routing tables with the CX-Integrator

so that it is possible to access both the built-in EtherNet/IP network (on the CJ2H-CPU6@-EIP or

CJ2M-CPU3@) and the FINS network from the Support Software.

*A “FINS Network Communications Unit” indicates a Controller Link Unit, SYSMAC LINK Unit,

Ethernet Unit, DeviceNet Unit, or FL-net Unit. CompoNet Units are not included. It also indi-

cates using the Serial Gateway for serial communications together with routing tables.

Additional Information

If one or more FINS Network Communications Units are connected to a CJ2H-CPU6@-EIP or

CJ2M-CPU3@, create and transfer the local network table. If you attempt access from the Sup-

port Software with the network address set to 0 (i.e., default) without creating and transferring

the local network table, you will access the node address of the built-in EtherNet/IP port in the

following cases.

If the unit number (default: 0) of the built-in EtherNet/IP port is lower than the unit number of the

FINS Communications Unit.

CJ2

FINS Network Communications Unit

FINS network

Local network table

Omron CJ2 CPU UNIT SOFTWARE User Manual

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