Using Offsets - Omron SYSMAC 3G8F5-CLK11-E Operation Manual

Checking Data Link Status

Using Offsets

Offset from the beginning
Number of words to be received
106
All nodes can be specified to either participate or not participate in the data link.
The data link areas are exactly the same and common to all nodes participat-
ing in the data links.
Note The Controller Link Support Software contains a function called
"Easy Setting" that can be used within the manual data link mode to
register the same data links as automatic setting. This Easy Setting
can be used first, and then the send size of each node and other set-
tings can be changed as required.
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.
Automatically set
data links
Manually set
data links
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 indi-
cating both the number of words and the starting word position from the begin-
ning of the area. The offset refers to the starting word position counted from the
beginning of the area.
# 1
# 1
# 2
# 3
# 1 # 2
# 1 # 1
# 2 # 2
# 3 # 3
# 1 # 2
# 1
# 1
# 2
# 2
# 3
# 3
A node can specify the number of
words to receive from the begin-
ning send word.
# 2
# 1
# 2
# 3
Restricted reception Restricted reception
from node 1 by from node 2 by
specifying an offset
specifying an offset
Section 6-1
# 3
# 1
# 2
# 3
# 3
# 1
# 2
# 3
# 3
# 3
# 2
# 1