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What Are Data Links?
Section 5-1
5-1
What Are Data Links?
Data links automatically exchange data in the preset areas between nodes
(PLCs and/or computers) on one network. Data links can be freely created for
CS/CJ-series PLCs, C200HX/HG/HE PLCs, CVM1, CV-series PLCs,
CQM1H-series PLCs, and IBM PC/AT or compatible computers.
Two data link areas, area 1 and area 2, can be set for each node. Data links
can be set in either of the following ways.
Functions supported by CS/CJ-series Controller Link Unit Models
Note
1.
Use the CX-Integrator to set a data link area in which the number of send
and receive words exceeds 12,000 words, or to set data link tables that al-
locate the same area for Area 1 and Area 2.
2.
Use the CX-Integrator Data Link Setting Tool version 3.2.1.1 or later to set
data link tables with more than 1,000 send words per node. For information
on checking the version number, refer to
Checking the CX-Integrator Data
• Data link areas can be manually set by inputting data link tables using
Support Software. Data link tables are created to define the data links.
These tables enable free allocation of data link areas.
• Data links can be set automatically from a Programming Device. With
automatically set data links, all link areas are the same size.
Both automatic setting and manual setting cannot be used together in the
same network. The following rules apply to these two methods of setting data
links.
• Data links are enabled concurrently for area 1 and area 2.
• Separate settings (data link start words and send area size) are made in
area 1 and area 2. The sequences of send and receive words are the
same in area 1 and area 2.
• Not all nodes must participate in the data links.
Model
CS1W-CLK23
CJ1W-CLK23
CS1W-CLK21-V1
CJ1W-CLK21-V1
Item
Unit version 1.2
Pre-Ver. 1.2
Maximum number of data
link words (data link area for
sending/receiving that is cre-
ated for a single node in a
single CPU Unit)
20,000 max.
12,000 max.
Maximum number of send
words (total for areas 1 and
2)
4,000 max. (for
user settings)
1,000 max.
Data Link Area
The same area cannot be allocated
for both Area 1 and Area 2.
The same area
can be allocated
for both Area 1
and Area 2.
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 ...