139
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, CS1W-CLK23, CJ1W-CLK21-V1, CJ1W-CLK23,
3G8F7-CLK21-V1, and 3G8F7-CLK23-E Controller Link Units. If any other
model is used, the LNK indicator will flash and it will not be possible to au-
tomatic 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.
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...