Omron CS1W-LC001 Operation Manual page 151

Exchanging Data with CX-Process Monitor/SCADA Software and with Other Nodes Section
this way enables data exchange between the Loop Control Unit and PCs
(CPU Unit) on the other node or Loop Control Units mounted on that PC.
Loop Control Unit
CPU Unit Terminal or
Expanded CPU Unit
Terminal block
2) To occupy Data Link Area 1 or 2 (use the Node Terminal blocks)
This mode is used to perform data exchange with a Loop Control Unit on a
PC at another node.
Note 1 The maximum number of points must be within the number used for the Send
from All Nodes and Receive from All Nodes Node Terminal blocks (that is,
maximum 50/100 function blocks, 32 contacts per function block, analog
value two words).
The PC on which the Loop Control Unit is mounted occupies Data Link Area
1 or 2 for the Loop Control Unit to establish the Controller Link Data Link with
the other node PC. Allocate the Data Memory (D) for the Node Terminals of
the CPU Unit to the Data Link Area. This enables data exchange between
the Loop Control Unit and Loop Control Unit at the other node PC by reading
and writing the Data Memory (D) for the Node Terminals on the CPU Unit.
Note, however, that Data Link Area 1 or 2 is occupied exclusively for the
Loop Control Unit and cannot be used for other purposes.
Loop Control Unit
Node Terminal blocks
CPU Unit
I/O Memory
At each
operation
cycle
Data Link
Area
At each
operation
cycle Data Link
Area
CPU Unit
Data Memory (D) for
Node Terminals
At each
operation
cycle
Area to send
to all nodes
At each
operation
Area to receive
cycle
from all nodes
CPU Unit
Loop Control Unit
at other node
Data send
Data receive
Part of Controller Link
Data Link is used.
Loop Control Unit
at other node
Data send
Data receive
Entire Controller Link
Data Link is occupied.
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