Omron NX Series - Page 157

Maintaining Concurrency in the Tag Data in a Tag Set
To maintain concurrency in the values of multiple tags in a tag set, the tags (variables with a Network
Publish attribute) must satisfy all of the following conditions.
a. The tags must be assigned to the same tag set (connection).
b. A refreshing task must be set for network variables assigned to the tags, and the refreshing task
must be the same for all the tags in the tag set.
• Setting Refreshing T
asks for Tags (Network Variables)
Concurrency of the tags in the tag set is maintained.
NJ/NX-series ControllerNJ/NX-series Controller
Connection
Tag data links updated.
Refreshing task
Refreshing task
EtherNet/IP
10
10
10
Value of v
ariable
100"10
100"10
100"10
Value of v
ariable
Variable c
Variable b
Variable a
Variable c
Variable b
Variable a
Tag set
Variable f
Variable e
Variable d
Tag set
The values of the
tags in the tag set
are refreshed at
the same time
.
• Not Setting Refreshing Tasks for Tags (Network Variables)
Concurrency of the tags in the tag set is not maintained.
Connection
Tag data links updated.
NJ/NX-series Controller NJ/NX-series Controller
Refreshing task Refreshing task
EtherNet/IP
100
10
10
Value of v
ariable
100 → 10
Value of v
ariable
Variable c
Variable b
Variable a
Variable c
Variable b
Variable a
Tag set
Variable f
Variable e
Variable d
Tag set
100 → 10
100 → 10
Not refreshed.
Refreshed.
Refreshed.
The
values of
tags in
the tag
set are
not
refreshed
at the
same
time.
9 Tag Data Link Functions
9-13
NX-series EtherNet/IP Unit User's Manual (W627)
9-1 Introduction to Tag Data Links
9
9-1-7 Concurrency of Tag Data Link Data