Omron CQM1H-CLK21 - Manual (Page 156)

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Setting Data Links Section 5-2
Note a) The total number of words in data link send and receive areas
must not exceed 20,000 per node when using Controller Link
Units with unit Ver. 1.2 or later, or 12,000 words per node if using
pre-Ver. 1.2 Controller Link Units.
b) The following values must be satisfied for each node for the data
link area 1 and area 2 so that the final word in the data link does
not go beyond the last word in the PLC memory area.
(Data link start word – 1) + Total number of send/receive
words in area
≤
6143 (CIO Area)
199 (LR Area)
32767 (DM Area, EM Area)
c) When using area 1 only, set the data link start word, type, and
the number of send words of area 2 to 0.
d) When using area 2 only, set the data link start word, type, and
the number of send words of area 1 to 0.
e) The startup node must be set as a participating node of the data
links. If not, the data links will not start.
Area for area 2 Set the area for area 2 in BCD.
DM Area: 82
EM Area: Banks 00 to 07: 90 to 97
Banks 08 to 12: A8 to AC
Area 2 not used: 00
Send size per node for
area 2 Set the number of words in BCD between 0 and 1,000.
The total number of send words of area 1 and area 2
must not exceed 1,000.
When area 2 is not used, set to 0.
First word to store link
status Set in BCD the first word used for storing data link status.
An area of 16 words is used for storing status.
0 (*), IR 000 to IR 6128
Status is stored in the IR or CIO Area only.
*: When 0 is set, the status is saved in IR 1500 + unit
number x 25 (+ 7 to + 22).
Nodes to participate in
the data links Turn ON the bits corresponding to the nodes participating
in the data links.
The data link will not start unless the startup node itself is
set as a participating node.
The data link will not start if the node is set to a parameter
exceeding the maximum node address of the network
parameter.
Item Setting range