Omron CQM1H-CLK21, CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1, C200HW-CLK21, CS1W-CLK21-V1 137

Setting Data Links Section 5-2

3.When using area 2 only, set the area for area 1 and the number of send words for area 1 to 0.

4.When using area 1 only, set the area for area 2 and the number of send words for area 2 to 0.

5.The total number of words in data link send and receive areas must not ex- ceed 20,000 per node when using Controller Link Units with unit Ver. 1.2 or later, or 12,000 words per node if using pre-Ver. 1.2 Controller Link Units. The total number of words in data link send and receive areas of a master node must satisfy the following values. The number of master node words is greatest when 1:N allocation is used, so the value can be estimat- ed from the number of master node words.

Total number of words in data link send and receive areas of master node = Send size for master node for area 1 + Send size for slave nodes for area 1 ⋅ Number of slave nodes participating in data links + Send size for master node for area 2 + Send size for slave nodes for area 1 ⋅ Number of slave nodes participating in data links

6.The following values must be satisfied to ensure that data link areas 1 and area 2 are fully contained within the specified area.

•For area 1:

(Area 1 start word − 1) + (Total of send and receive sizes for master node for area 1 (See note.))

≤6143 (when using the IR or CIO Area)

≤199 (when using the LR Area)

Note (Total of send and receive sizes for master node for area 1 = Send size for master node for area 1 + Send size for slave nodes for area 1 ⋅ Number of slave nodes participating in data links

•For area 2:

(Area 2 start word − 1) + (Total of send and receive sizes for master

node for area 2 (See note.))

≤ 32767 (when using DM or EM Area)

Note (Total of send and receive sizes for master node for area 2 = Send size for master node for area 2 + Send size for slave nodes for area 2 ⋅ Number of slave nodes participating in data links

7.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 and receive areas will be refreshed with 0 data.

8.Automatic data link creation with 1:N allocations can be performed only with CS1W-CLK21-V1, CJ1W-CLK21-V1, 3G8F7-CLK21-V1 Controller Link Units. If any other model is used, the LNK indicator will flash and it will not be possible to automatic create 1:N allocations.

9.If automatic data link creation with 1:N allocations 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 3.1 or lower.

10.The startup node (the node that sets the above DM Area Parameters and starts the data links) can be set as either a master node or a slave node.

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