Omron SYSMAC LINK C1000H-SLK21-V1 System Manual page 61

Automatic Generation of Data Link Tables
Allocated Words
Data Flow
Data Link Area Refresh
If automatic generation is specified by bits AR 0700/0701 or AR 0704/0705, the
words allocated to each Unit are determined by the node number of the Unit and
the Words per Node settings in the AR word shown above. Words are allocated
as shown in the following table.
LR words* DM words*
00 to 03 0000 to 0007
04 to 07 0008 to 0015
08 to 11 0016 to 0023
12 to 15 0024 to 0031
16 to 19 0032 to 0039
20 to 23 0040 to 0047
24 to 27 0048 to 0055
28 to 31 0056 to 0063
32 to 35 0064 to 0071
36 to 39 0072 to 0079
40 to 43 0080 to 0087
44 to 47 0088 to 0095
48 to 51 0096 to 0103
52 to 55 0104 to 0111
56 to 59 0112 to 0119
60 to 63 0120 to 0127
Note *When combining CV-series PCs in data links with C-series PCs, LR 00 to LR 63
in C-series PCs correspond to CIO 1000 to CIO 1063 in CV-series PCs and
DM 0000 to DM 0127 correspond to D00000 to D00127.
This example shows data flow resulting from automatic generation with four PCs
exchanging 16 LR words each. The data link table information in AR 07 of the
start-up node, indicates that only the LR Area will be used and it will be divided
into 4 parts; this information is transmitted to all nodes. The AR 07 settings in
other nodes are ignored. Shading indicates the words written and transmitted by
each PC; non-shaded words are those received from other PCs.
Node #1 Node #2
LR 00 to LR 00 to
LR 15 LR 15
LR 16 to LR 16 to
LR 31 LR 31
LR 32 to LR 32 to
LR 47 LR 47
LR 48 to LR 48 to
LR 63 LR 63
Data links are refreshed for all nodes between the lowest-numbered and the
highest-numbered node designated to participate in the data link. Link words
automatically allocated to nodes assigned numbers lower than the lowest-num-
ber participating node or higher than the highest-number participating node can
be used as work words. Words allocated to a node number between the lowest
and highest-numbered nodes cannot be used as work words even if there isn't a
node with that node number.
Words per node
4 8
Node #1 Node #1
Node #2
Node #3 Node #2
Node #4
Node #5 Node #3
Node #6
Node #7 Node #4
Node #8
Node #9 Node #5
Node #10
Node #11 Node #6
Node #12
Node #13 Node #7
Node #14
Node #15 Node #8
Node #16
Node #3 Node #4
LR 00 to LR 00 to
(Node #1 data)
LR 15 LR 15
LR 16 to LR 16 to
(Node #2 data)
LR 31 LR 31
LR 32 to LR 32 to
(Node #3 data)
LR 47 LR 47
LR 48 to LR 48 to
(Node #4 data)
LR 63 LR 63
Section 5-3
16 32
Node #1 Node #1
Node #2
Node #3 Node #2
Node #4
47