Omron NX701-17 Series Troubleshooting Manual page 40

1 Overview of Errors
*1 Only for NX1P2 CPU Units.
Note An NC Integrated Controller has the CNC Function Module. For how to check and correct errors in the CNC
Function Module, refer to the NJ/NY-series NC Integrated Controller User's Manual (Cat. No. O030).
The event source is displayed on the Sysmac Studio or HMI.
 Levels of Controller Events (Errors and Information)
The following table classifies the levels of Controller events according to the effect that the errors
have on control.
No. Level
1
2
3
4
5
Errors with a higher level have a greater impact on the functions that the NJ/NX-series Controller
provides, and are more difficult to recover from. When an event occurs, the Sysmac Studio or HMI
will display the level name.
Event Levels
• Major Fault Level
These errors prevent control operations for the entire Controller. When the CPU Unit detects a
major fault, it immediately stops the execution of the user program and turns OFF the loads of all
slave, including remote I/O. With EtherCAT slaves, some NX Units, and some CJ-series Special
Units, you can set the slave settings or Unit settings to select whether outputs will go OFF or
retain their previous status. You cannot reset major fault level errors from the user program, the
Sysmac Studio or an HMI. To recover from a major fault level error, remove the cause of the error,
and either cycle the power supply to the Controller, or reset the Controller from the Sysmac Stu-
dio.
• Partial Fault Level
These errors prevent control operations in a certain function module in the Controller. The NJ/NX-
series CPU Unit continues to execute the user program even after a partial fault level error occurs.
You can include error processing in the user program in order to stop equipment safely. After you
remove the cause of the error, execute one of the following to return to normal status.
• Reset the error from the user program, the Sysmac Studio, or an HMI.
• Cycle the power supply.
• Reset the Controller from the Sysmac Studio.
• Minor Fault Level
These errors prevent part of the control operations in a certain function module in the Controller.
The troubleshooting for minor fault level errors is the same as the processing for partial fault level
errors.
• Observations
These errors do not affect the control operations of the Controller. The observation notifies you of
potential problems before they develop into a minor fault level error or worse.
• Information
Events that are classified as information provide information that do not indicate errors.
You can change the event level for some events. Refer to the NJ/NX-series CPU Unit Software User's
Manual (Cat. No. W501) for details on changing event levels. Refer to 3-1 Errors by Source in this man-
ual to see the events for which you can change the event level.
1-12
Classification
High Controller errors
Low Controller informa-
tion
Level name
Major fault level
Partial fault level
Minor fault level
Observation
Information
NJ/NX-series Troubleshooting Manual (W503)