Omron NJ501-1 Series User Manual page 216

5 Troubleshooting
Event name Safe Mode
Meaning The Controller started in Safe Mode.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
The power supply was turned ON to
the Controller when Safe Mode was
set on the DIP switch on the CPU
Unit.
Attached None
information
Precautions/ If the Controller is started when the CPU Unit is in Safe Mode, the user program is not executed even if the startup
Remarks mode is set to RUN mode.
* For details, refer to I/O Operation for Major Fault Level Controller Errors on page 5-6.
Event name Event Log Restoration Error
Meaning Restoring the event log failed.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
A low battery voltage prevented reten-
tion of memory during a power inter-
ruption.
Attached Attached information 1: Error Details (0: Failure to restore all categories of logs, 1: Failure to restore system event log,
information 2: Failure to restore access event log, 100: Failure to restore user-defined event log)
Precautions/ None
Remarks
5-50
Source details
Major fault Recovery
Stops. Operation
Data type
---
Correction
---
Source details
Observation Recovery
Starts. Operation
Data type
---
Correction
Replace the Battery.
Event code 4016 0000 hex
None Detection
timing
Cycle the power Log category
supply or reset
the Controller.
Stops.*
Name
---
Prevention
---
Event code 1023 0000 hex
None Detection
timing
--- Log category
Not affected. However, the past event log cannot be
checked.
Name
---
Prevention
Replace the battery periodically.
NJ-series CPU Unit Hardware User's Manual (W500)
At power ON or
Controller reset
System
At power ON or
Controller reset
System