Omron NJ Series User Manual

2 CPU Unit Operation
2-8
NJ-series CPU Unit Software User’s Manual (W501)
 Processing Performed by the Tag Data Link Service
The tag data link service processes communications that use tags with other controllers or devices
on an EtherNet/IP network. You can use the built-in EtherNet/IP port in the CPU Unit or a CJ-series
CJ1W-EIP21 EtherNet/IP Unit to connect to an HMI.
 Operation of the Tag Data Link Service
The tag data link service is executed periodically. The period and the time that is required for each
execution depend on the model of the CPU Unit and on the tag data link settings.
The execution priority of the tag data link service is between the execution priorities of the priority-16
periodic task and the priority-17 periodic task. Therefore, the tag data link service will be given prior-
ity over execution of the priority-17 periodic task, but it may sometimes be interrupted to execute the
primary periodic task or the priority-16 periodic task.
For details on the tag data link service, refer to 5-2-7 Tag Data Link Service and System Services.
Tag Data Link Service
Task
Task
Task Task
Task period of
primary periodic task
Task
Primary
periodic task
Priority-16 periodic
task
Tag data link
service
The tag data link service is executed with a priority that is between the execution
priorities of the priority-16 periodic task and the priority-17 periodic task.
Priority-17 periodic
task
Task period of
primary periodic task
Task period of
primary periodic task
Task period of periodic task
Task period of periodic task
Task period of periodic tas
k
Task
Interrupted.

Omron NJ Series Specifications

General

Program Capacity	Up to 128 MB
SD Card Slot	Yes
Power Supply Voltage	24 VDC
Motion Control	Yes
USB Ports	1
Operating Temperature	0°C to 55°C
Communication Interfaces	Ethernet/IP, EtherCAT, USB
Safety Function	Optional
Storage Temperature	-20°C to 75°C
Communication Ports	USB
Dimensions	Varies by model
Weight	Varies by model