Omron SYSMAC 3G8F7-CLK13-E Operation Manual page 45

Applications Precautions
• Adding Nodes with a Repeater Unit at One End
Terminating
resistance ON
Turn ON terminating resistance at
the nodes on both ends of each
segment shown within broken lines.
Before connecting the new nodes to the existing network, always set the poll-
ing/polled node setting in the Controller Link Support Board driver properties
to Polled. If the nodes are connected to the existing network with this setting
set to Polling, the corresponding node may become the polling node for the
network, which will affect the network in the following ways. After the new
nodes are participating in the network normally, return the polling/polled node
setting to polling node.
• When the data link startup switch of the new node is OFF, all the data
links for the whole network including the existing network will be inactive.
• When the network parameters being used are different from the default
values, the network parameters will return to the default values.
After confirming that the new node has properly joined the network, set the
polling/polled node setting in the Controller Link Support Board driver proper-
ties to Polling.
Always set the Max Node Number set 62 option in the Controller Link Support
Board driver properties of the new node to match the settings of the existing
network. If different settings are used, the network may not be configured cor-
rectly.
When a new node is to be added to a system that is already wired over a long
distance using T-branch lines or Repeater Units, turn OFF the power to the
PCs in the segment where the node is to be added. The power to the PCs in
segments separated by Repeater Units does not need to be turned OFF.
Refer to the Controller Link Unit Operation Manual (W309).
Systems with an Existing T-branch Line
CS1W-RPT01
Repeater Unit
Terminating
resistance ON
CS1W-RPT01 Newly added nodes
Repeater Unit
Terminating
resistance ON
The power to the PCs of the segment
shown within the dot-dash broken
line does not need to be turned OFF.
The power to the PCs in the
segment shown within the dash
broken line must be turned OFF.
New node to be added
Section 1-4
Terminating
resistance ON
25