Omron NJ501-1400 User Manual page 219

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