Omron NJ Series User Manual

5-29
5 Designing Tasks
NJ-series CPU Unit Software User’s Manual (W501)
5-2 Task System
5
5-2-9 Processing Performed in and Execution Timing of the System Services
Version Information
Execution of processing for tag data links depends on the unit version of the CPU Unit and the
Sysmac Studio version as given below.
* If a unit version of 1.02 or earlier is set on the Sysmac Studio, the tag data links are processed in the built-
in EtherNet/IP port service in the system services.
The CPU Unit uses system services to perform any processing other than the processing of tasks.
System services include the following processing.
*1 The CPU Unit exchanges data between CJ-series Special Units and the memory words that are allocated to
them during I/O refreshing.
The system services are executed in the unused time between execution of the tasks and tag data
link service. If sufficient time cannot be obtained to execute the system services, the processing of
tasks with an execution priority of 17 or higher will be interrupted to allocate sufficient time. You can
set the time for execution of the system services in the System Service Monitoring Settings on the
Sysmac Studio.
There is no priority in the processing of system services. All of the processing is executed in parallel
with time slicing.
Unit version of CPU Unit
Sysmac Studio version
1.03 or lower 1.04 or higher
1.03 or later Built-in EtherNet/IP port ser-
vice in system services
Tag data link service*
1.02 or earlier Built-in EtherNet/IP port service in system services
5-2-9 Processing Performed in and Execution Timing of the System
Services
Processing Performed in System Services
System service Description
USB port service • Processing of service requests from the Sysmac Studio or host comput-
ers.
Built-in EtherNet/IP port ser-
vice
• Processing of message service requests, such as CIP commands, from
the Sysmac Studio, an HMI, host computers, or other Controllers
• Execution of communications instructions for CIP and socket communica-
tions
Built-in EtherCAT port service • Execution of EtherCAT message communications
Service for CJ-series Special
Units
*1
• Event servicing for CJ-series Special Units
• Execution of communications instructions (CIP)
SD Memory Card service • Access from FTP client
• SD Memory Card operations from the Sysmac Studio
• Execution of SD Memory Card instructions
Self-diagnosis • Hardware error detection
Execution Timing of the System Services

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English