8 CPU Unit Functions
8-48
NJ-series CPU Unit Software User’s Manual (W501)
8-6 Event Logs
This section describes the event logs.
The event logs contain records of events,* such as errors, status changes, and user-defined events,
that occurred in the NJ-series Controller.
* Here, events are unscheduled events that occur on the Controller, such as errors. “Event” refers to an error or to
information that does not indicate an error but for which the user must be notified by the Controller or for a user
definition. There are two types and four classifications of events.
• Controller events
Controller errors
Controller information
• User-defined events
User-defined errors
User-defined Information
To use an NS-series PT to check events, connect the PT to the built-in EtherNet/IP port on the CPU
Unit.
Event logs have the following features.
• In addition to error records, various records are recorded for events such as the time the power sup-
ply is turned ON or OFF, and the time when operation is started.
• You can check these records based on the time. You can therefore use them to isolate the causes of
errors when problems occur.
8-6-1 Introduction
Features
Sysmac Studio
Battery backup
User program
NS-series PT
Or
Errors in
Special Units
EtherNet/IP
Function Module
EtherCAT
slave
EtherCAT Master
Function Module
Motion Control
Function Module
Event logs
PLC Function
Module
Event
sources
Create User-defined
Error (SetAlarm)
instruction
Create User-defined
Information (SetInfo)
instruction
CJ-series
Units
NJ-series CPU Unit
You can check the current
Controller events and the event
log of past events.
You can check the current
Controller events and the event
log of past events.
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