8 CPU Unit Functions
8-54
NJ-series CPU Unit Software User’s Manual (W501)
Controller errors and information are defined by the NJ-series System. These events occur when the
NJ-series System detects an error or information factor.
Controller Errors
These are system-defined errors. “Controller error” is a collective term for major fault level, partial
fault level, minor fault level, and observation level Controller events. Errors in the function modules of
the CPU Unit, CJ-series Units, and EtherCAT slaves are detected. When one of these events
occurs, a Controller error is recorded in the event log. To check the status of a Controller error on the
user program, you execute the Get Error Status instruction to access the status of the Error Status
variable, which is a system-defined variable. Controller errors are not reset when the operating
mode changes. Refer to the NJ-series Troubleshooting Manual (Cat. No. W503) for details on Con-
troller Errors.
Controller Information
Controller information is system-defined notification information. This information does not indicate
errors. It represents information level Controller events. Examples include events other than errors,
such as turning the power ON and OFF, starting and stopping operation, connecting the Sysmac
Studio online, and downloading user programs.
8-6-3 Controller Events (Controller Errors and Information)
Introduction
Event logs
System-defined variables
Error status
Detected Controller errors
Controller events
PLC Function
Module
Motion Control
Function Module
EtherCAT
Master Function
Module
EtherNet/IP
Function Module
Errors in Special
Units
Errors in EtherCAT
slaves
An error or information occurs.
Function Modules
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