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8 CPU Unit Functions
NJ-series CPU Unit Software User’s Manual (W501)
8-6 Event Logs
8
8-6-2 Detailed Information on Event Logs
Events are classified as shown below.
System-defined Events (Controller Events)
The Controller automatically detects these events. Controller events include events for the function
modules in the CPU Unit, CJ-series Units, and EtherCAT slaves. The different types of system-
defined events are as follows:
• Controller errors
• Controller information
User-defined Events
These are events that occur in applications that the user developed. You can execute instructions to
create the following types of events.
• User-defined errors
• User-defined information
You can read the event logs from the Sysmac Studio or from an NJ-series-compatible NS-series PT.
This information identifies where an event occurred in the Controller. The event sources are given
below for Controller events and user-defined events.
Sources of Controller Events
Controller events occur in the function modules in the CPU Unit.
For some function modules, there is more detailed information about the event source. This informa-
tion is called the detailed event source.
The following are Controller events.
* The source details information does not show information from the error histories from within CJ-series CPU
Special Units or EtherCAT slaves. Read the error histories from the appropriate Support Software.
Sources of User-defined Events
User-defined events occur in the PLC Function Module.
Types of Events
8-6-2 Detailed Information on Event Logs
Event Sources
Event source Source details
PLC Function Module I/O bus master or CJ-series Unit *
Motion Control Function Module Common, axis, or axes group
EtherCAT Master Function Module Communications port, EtherCAT master, or EtherCAT
slave
EtherNet/IP Function Module Communications port, CIP, FTP, NTP, or SNMP