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How to Use the Node Terminal Block
Appendix 2
220
During data reception: DI Terminal from All Nodes (Block Model 414)
AI Terminal from All Nodes (Block Model 415)
The self node PC receives the data that was sent from the Loop Control Unit at the other
node PC by the Controller Link Data Link. The Loop Control Unit on the self node PC uses
DI Terminal from All Nodes (Block Model 414) and AI Terminal from All Nodes (Block Model
415) to read data from the Area to receive from all nodes (on CPU Unit).
The Loop Control Units at this time can be connected only by the Controller Link. Moreover,
user settings for the Data Link must be set for the Loop Control Units.
For details, see How to Set Controller Link Data Link Tables described later in this
Appendix.
CPU Unit
Area to send to
all nodes
Loop Control Unit
Node Terminal block
I/O memory
Loop Control Unit at other node
Data send
At each
operation
cycle
Area to receive
from all nodes
Data receive
According to
Controller Link
Data Link
According to
Controller Link
Data Link
Here, the Node
Terminal block is
used in the same
way to receive and
send data.
At each
operation
cycle
Controller Link connection
Loop Control Unit
Controller Link network
Controller Link unit
Data Link