4 Support Software
4-10
CJ2 CPU Unit Hardware User’s Manual
*3 Always use an Ethernet switch when using tag data links in the network. If a repeater hub is used for Ether-
Net/IP tag data links (cyclic communications), the network's communications load will increase, data collisions
will occur frequently, and stable communications will be impossible.
To connect using Ethernet, first set the IP address and subnet mask of the computer in advance as
shown in the following example.
• IP Addresses
• Subnet Mask
The method for connecting the PLC to the personal computer is set using the CX-Programmer. For
details on using the CX-Programmer to set the connection method, refer to the CJ2 CPU Unit Software
User’s Manual (Cat. No. W473).
Additional Information
• The CX-Programmer can be used for remote programming and monitoring. It can be used to
program and monitor not only the PLC to which it is directly connected, but also to program
and monitor any PLC connected through a Controller Link or Ethernet network to which the
PLC that the CX-Programmer is connected to is a part of. All programming and monitoring
functionality for the directly connected PLC is supported for remote programming and monitor-
ing. For details, refer to 11-2 Serial Communications and 11-3 Communications Networks in
the CJ2 CPU Unit Software User’s Manual (Cat. No. W473).
Before Connecting
CX-Programmer Settings
192.168.250.2
Example:
User-set value (1 to 254)
Value for same segment as IP address
of built-in EtherNet/IP port
255.255.255.0.200
Example:
User-set value (0 to 252)
Class C mask
FINS
CX-Programmer
Peripheral bus
or Host Link
Peripheral (USB) port
or RS-232C port
Controller Link or Ethernet Network
Remote programming
and monitoring
CX-Programmer
Peripheral bus or
Host Link
Bridge
Ethernet Network
Controller Link Network
Gateway
Controller Link Network
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