Omron NJ Series User Manual page 515

The following text strings are recognized as the I/O memory address names.
1. Variable names that contain only single-byte numerals from 0000 to 6143
2. Variable names with the following single-byte letters (uppercase or lowercase) followed by
single-byte numerals
• H (H000 to H511)
• W (W000 to W511)
• D (D00000 to D32767)
• E0_ to E18_(E0_00000 ... E0_32767 to E18_00000 ... E18_32767)
To specify an I/O memory address for a tag on an NJ-series CPU Unit, NX102 CPU Unit, or
NX1P2 CPU Unit, do not specify the I/O memory address for the tag directly. Instead, create a
variable, set an AT specification of the I/O memory address on the Sysmac Studio, and then
specify the variable with the AT specification for the tag.
• Size of variables
To use an EtherNet/IP Unit as an EtherNet/IP device, set an even number of bytes for the size of
the network variable used for the EtherNet/IP connections regardless of an odd number of bytes
for the tag size.
Network variable
(4 bytes)
The CPU Unit memory is consumed in units of two bytes. To assign tags of odd numbers of bytes
to network variables, specify even byte numbers (i.e., sizes of the tags + 1) to the network variables.
• Data concurrency
To maintain concurrency in the values of network variables that are assigned to tags, you must
set refreshing tasks.
Refer to 7-1-7 Concurrency of Tag Data Link Data on page 7-12 for details.
Registering the Tag and Tag Set
Register the required tag and tag set for the EtherNet/IP connections.
You can register tags and tag sets in the EtherNet/IP Connection Setting Tab Page.
Precautions for Correct Use
Make the following settings to refresh all of the tag data in the same tag set at the same time.
• Use the Sysmac Studio, in advance, to specify the same refreshing task for all of the varia-
bles that are assigned to tags in the tag set.
• If you use the NJ-series CPU Unit, do not place tag variables that have AT specifications in
I/O memory and tag variables that do not have AT specifications in the same tag set.
1
Select EtherNet/IP Connection Settings from the Tools Menu.
The EtherNet/IP Device List Tab Page is displayed.
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
AAA
Tag
AAA
(3 bytes)
Appendices
A
A-11