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What Are Data Links?
Section 5-1
Manually Setting Data Links
Manually set data links are used to create flexible data links that meet the
needs of the individual system.
• Data links are set in the Controller Link Unit or Board of each node using
the Support Software.
• Area 1 and area 2 can be selected from PLC memory areas, including the
DM Area and EM Area.
• A send area and its size can be allocated freely for each node.
• The sequence of receive nodes can be changed.
• Nodes can be set that only send or only receive data.
• Only part of send data can be received and an offset can be used to spec-
ify the beginning of the desired part.
Manual Setting Options
The following options can be set when manually setting data links.
Offsets
Data of the only the specified number of words can be received starting from
the specified word position. The starting word is set as an offset from the
beginning of the send data. The following is an example.
Easy Setting
The send data areas of all nodes can be set to the same size (same as for
automatic setting described next).
# 1
# 1
# 1
# 2
# 2
# 2
# 2
# 1
# 2
# 2
# 1
# 1
# 1
# 1
# 2
# 2
# 1
# 2
# 1
# 2
# 1
# 1
Area 1
Area 2
Area 1
Area 2
Send only
Example 1: The order of send and receive
nodes is free.
Example 2: Some nodes can send data
without receiving data.
# 1
# 2
# 2
# 1
# 1
# 2
# 1
# 2
# 1
# 1
# 1
# 2
# 2
# 2
# 2
# 2
# 1
# 2
Area 1
Area 2
Area 1
Area 2
Receive only
Receive only
Several
words from
the begin-
ning of
area
Example 3: Some nodes can receive
data without sending data.
Example 4: A node can receive only a
specified number of words from
the beginning of an area.
# 1
# 1
#2
# 1
# 2
# 1
# 1
# 2
# 1
Area 1
Area 2
Specified position in relation to the leading word
Specified number of words
Specified position in relation to the leading word
Specified number of words
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 ...