Omron NJ501-1320 - Page 219

5-39
5 Troubleshooting
NJ-series CPU Unit Hardware User’s Manual (W500)
5-2 Troubleshooting
5
5-2-4 Error Descriptions
Event name Real-Time Clock Stopped Event code 00070000 hex
Meaning The oscillation of the real-time clock stopped. The real-time clock is set to an illegal time.
Source PLC Function Module Source details None Detection
timing
At power ON or
Controller reset
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation The System Time is not defined. The clock information
recorded by CJ-series Units is also not defined.
System-defined
variables
Variable Data type Name
_CurrentTime DATE_AND_TIME System Time
Cause and
correction
Assumed cause Correction Prevention
The battery voltage is low. Replace the Battery. Then adjust the
real-time clock time.
Regularly replace the Battery.
The battery connector has come
loose.
Reconnect the connector and make
sure it is mated correctly. Then adjust
the real-time clock time.
Check for vibration and shock.
The Battery is missing. Install a Battery. Then adjust the real-
time clock time.
Install a Battery.
Attached
information
None
Precautions/
Remarks
This error is checked only when the power is turned ON. You can change the event level to the observation level. If you
change the level to the observation level, recovery procedures are not required.
Event name Real-Time Clock Failed Event code 00080000 hex
Meaning The real-time clock in the CPU Unit failed.
Source PLC Function Module Source details None Detection
timing
At power ON or
Controller reset
Error attributes Level Minor fault Recovery Cycle the power
supply.
Log category System
Effects User program Continues. Operation The System Time is not defined. The clock information
recorded by CJ-series Units is also not defined.
System-defined
variables
Variable Data type Name
_CurrentTime DATE_AND_TIME System Time
Cause and
correction
Assumed cause Correction Prevention
The CPU Unit clock has failed. Replace the CPU Unit. None
Attached
information
None
Precautions/
Remarks
None