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What Are Data Links? Section 5-1
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
# 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