Omron C200HW-CLK21 Operation Manual page 164

Setting Data Links
1:N Allocation, Chain Type
(Area start word
master node *)
6143 (when using the IR or CIO Area)
199 (when using LR Area)
32767 (when using DM or EM Area)
* Total number of send and receive words in master node =
Number of common send words in master node +
Number of individual send words in master node
nodes participating in data links +
Number of send words in slave node
ipating in data links
6. If a node that does not actually exist (e.g., a node that is scheduled to be
added in the future) is registered as a node that will participate in the data
links, a data link area for that node will be allocated in the master node, and
the send/receive area will be refreshed with "0" data.
7. Automatic data link creation with 1:N allocation can only be performed with
CS1W-CLK21-V1, CJ1W-CLK21-V1, 3G8F7-CLK21-V1 Controller Link
Units. If any other model is used, the LNK LED will flash and it will not be
possible to participate in the automatic creation with 1:N allocation.
8. If automatic data link creation with 1:N allocation is to be set up using CX-
Net operations in the CX-Programmer, use CX-Programmer Version 3.2 or
higher. Setup cannot be performed using CX-Programmer Version 3.2 or
lower.
9. The startup node (the node that sets the above DM parameter and starts
the data link) can be set at either a master node or a slave node.
(1) Area and start word
(2) No. of master common send
words
(3) No. of receive and send
words per node
Features of Chain Type 1:N Allocation
• Data communications are 1:1 between the master node and slave nodes.
• All slave nodes receive part of the data sent by the master node. (1a in
figure).
• The master node receives all data sent by the slaves. The data sizes are
fixed for all nodes.
1) + (Total number of send and receive words of
(4) Participating nodes
Master node
1a
1b
2
(Same as (3))
3
(Same as (3))
4
(Same as (3))
Section 5-2
Number of slave
Number of slave nodes partic-
Slave nodes
1a 1a 1a
1b
2 3
2 3 4
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