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Data Link Specifications
Table Generation
Note
Controlling Data Links
4-2
Data Link Specifications
Data Link Allocations for Automatic Settings
Data link tables can be generated automatically or manually. Data link tables
generated automatically are identical in all PLCs in the data link, with the
words of the data areas listed below divided equally among 2, 4, 8, or 16
nodes. The number of words allocated to each node depend on the number of
nodes linked and is given in 4-2-1 Specifications Table later in this section.
CIO Area
CIO 1000 to CIO 1063
DM Area
D00000 to D00127
Manual generation provides much greater flexibility in making data links
among PLCs, but require that you manually input the data link tables. Manu-
ally generated data links can contain far more words and can use any part of
the CIO Area and/or DM Area, as shown in the following table.
Area
Data Link Area
CIO Area
CIO 0000 to CIO 6143
DM Area
D00000 to D32767
Use Ver. 1.2 Service Pack 1 of the CX-Programmer. Settings for CS-series
SYSMAC LINK Units cannot be made with earlier versions of the CX-Pro-
grammer.
Data links can be activated and deactivated by turning ON and OFF bit 00 of
the first CPU Bus Link Area word allocated to the SYSMAC LINK Unit in PLC
memory, i.e., bit 00 of word D30000 + (100 x unit number).
Basic specifications for data links are provided in the following table.
Item
Number of data link nodes
Number of linked words per node
Maximum number of linked words
in network
Automatically generated data links Set in DM Area parameters.
Manually generated data links
Status Area (in CPU Bus Link
Area)
Data link table backup
Area
Words allocated
CIO Area
CIO 1000 to CIO 1063 32
DM Area
D00000 to D00127
Description
62 max., 2 min.
CIO Area: 254 words max.
DM Area: 254 words max.
2,966 words
(918 words for any Network with one or more
C200H PLCs)
(See following table)
Set from the CX-Net in CX-Programmer.
CIO 1500 + (unit number x 25) + 8 to 23
(See following table)
CPU Bus Unit Setting Area inside CPU Unit
(only for manually set data links)
Number of words per node
2 nodes
4 nodes
8 nodes
16
8
64
32
16
Section 4-2
16 nodes
4
8
43
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