Omron CJ - 08-2008 Operation Manual page 174

Expanded System Configuration
Controller Link
DeviceNet
126
the PLC, or between PLCs. By executing FTP commands for the PLC from
the Host computer connected to the Ethernet, the contents of the files on the
Memory Card installed in the CPU Unit can be read or written (transferred).
Data can be sent and received using UDP and TCP protocols. These func-
tions enable a greater compatibility with information networks.
Host computer
FTP command
FINS
The Controller Link Network is the basic framework of the OMRON PLC FA
Network. Connecting a Controller Link Unit to the network enables data links
between PLCs, so that data can be shared without programming, and FINS
message communications between PLCs, which enable separate control and
data transfer when required. The Controller Link Network connections use
either twisted-pair cables or optical fiber cables. Data links and message com-
munications are also possible between the PLC and personal computer. Data
links enable large-capacity and free allocations. FINS message communica-
tions also allow large-capacity data transfer.
Controller Link Unit
Messages
Controller Link
Data link
DeviceNet is a multi-vendor network consisting of multi-bit control and infor-
mation systems and conforms to the Open Field DeviceNet specification.
Connecting a DeviceNet Master Unit to the network enables remote I/O com-
munications between the PLC and the Slaves on the network. Remote I/O
communications enable large-capacity I/O and user-set allocations. Analog
I/O Terminals are used for the Slaves. Message communications are possible
between PLCs and between the PLC and DeviceNet devices manufactured by
other companies.
Ethernet
FINS
Ethernet Unit
Controller Link Unit
Section 2-5
Ethernet Unit
Control-
ler Link
Support
Board
Free
allocation