![background image](http://html.mh-extra.com/html/omron/sysmac-3g8f7-clk12-ev1/sysmac-3g8f7-clk12-ev1_operation-manual_1633421095.webp)
75
What Are Data Links?
Section 5-1
Note
1. Automatic data link creation with 1:N allocations can only be used with the
following Controller Link Units and Support Boards:
2. Lot numbers 030601 or later.
3. Controller Link Units and Support Boards other than those listed above
cannot participate in 1:N allocation data links. They can, however, join the
network if a parameter in the DM Parameter Area is set so that they do not
participate in the data links.
4. The Controller Link Support Board can be used in automatic data link cre-
ation with 1:N allocations, but it cannot be the startup node. Use a Control-
ler Link Unit on the same network as the startup node.
5. For automatic data link creation with 1:N allocations, use the CX-Net in
CX-Programmer version 3.2 or later.
Using Offsets
For automatically set data links, all of the send words transmitted by a node
are received by other nodes with no change in size. For manually set data
links, the size of a receive area can be restricted by specifying a number of
words from the beginning word of the words sent by another node.
However, the above system does not guarantee that only the desired words
will be received and there is a good chance that unnecessary data will also be
received.
Offsetting enables specification of a more specific range of receive data by
indicating both the number of words and the starting word position from the
beginning of the area. The offset refers to the starting word position counted
from the beginning of the area.
Wired Networks
CS1W-CLK23, CJ1W-CLK23, 3G8F7-CLK23-E,
CS1W-CLK21-V1, CJ1W-CLK21-V1, and 3G8F7-
CLK21-EV1
Optical Ring Networks
using H-PCF Cable
CS1W-CLK13, 3G8F7-CLK13-E,
CS1W-CLK12-V1 (See note 2.), and 3G8F7-CLK12-EV1
Optical Ring Networks
using GI Cable
CS1W-CLK53, 3G8F7-CLK53-E,
CS1W-CLK52-V1 (See note 2.), and 3G8F7-CLK52-EV1
# 1
# 2
# 3
# 2
# 3
# 2
# 3
# 3
# 2
# 1
# 1
# 3
# 2
# 1
# 1
# 3
# 2
# 1
# 1
# 2
# 3
# 1
# 2
# 3
Manually set
data links
A node can specify the number of
words to recei
v
e from the beginning
send word.
Automatically set
data links
# 1
# 2
# 3
# 3
# 1
# 3
# 2
# 2
# 1
Offset from the beginning
N
umber of words to be recei
v
ed
Restricted reception
from node 1 by
specifying an offset
Restricted reception
from node 2 by
specifying an offset
# 1
# 2
# 3
Summary of Contents for SYSMAC 3G8F7-CLK12-EV1
Page 2: ......
Page 4: ...iv ...
Page 20: ...xx Conformance to EC Directives 6 ...
Page 48: ...28 Applications Precautions Section 1 4 Example CX Programmer Response Timeout Setting ...
Page 68: ...48 Backup Power Supply Wiring Optical Ring Systems Only Section 2 4 ...
Page 74: ...54 Using the C Library Section 3 2 ...
Page 110: ...90 Changing the Data Link Tables with Active Data Links Section 5 5 ...
Page 187: ......