Omron NJ501-1320 - Page 220

5 Troubleshooting
5-40
NJ-series CPU Unit Hardware User’s Manual (W500)
* The level was changed from the observation level to the minor fault level for unit version 1.03.
Event name Low Battery Voltage Event code 000B0000 hex
Meaning The voltage of the Battery has dropped.
Source PLC Function Module Source details None Detection
timing
Continuously
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation No affected
System-defined
variables
Variable Data type Name
_SelfTest_LowBattery BOOL Low Battery Flag
Cause and
correction
Assumed cause Correction Prevention
The battery voltage is low. Replace the Battery. Regularly replace the Battery.
The battery connector has come
loose.
Reconnect the connector and make
sure it is mated correctly.
Check for vibration and shock.
The Battery is missing. Install a Battery. Install a Battery.
Attached
information
None
Precautions/
Remarks
You may loose the user data the next time that the power supply is interrupted. 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 CPU Unit Overheat Event code 000C0000 hex
Meaning The temperature inside the CPU Unit exceeded the specified value.
Source PLC Function Module Source details None Detection
timing
Continuously
Error attributes Level Minor fault* Recovery Cycle the power
supply or reset
the Controller.
Log category System
Effects User program Continues. Operation Not affected.
System-defined
variables
Variable Data type Name
_SelfTest_HighTemperature BOOL CPU Unit High Temperature Flag
Cause and
correction
Assumed cause Correction Prevention
The ambient operating temperature is
too high.
Make sure that the ambient operating
temperature stays between 0 and
55C.
• Provide enough space for good air
flow.
• Do not install the Controller above
equipment that generates a large
amount of heat, such as heaters,
transformers, or high-capacity
resistors.
• If the ambient temperature exceeds
55C, install a cooling fan or air
conditioner.
Make sure that the ambient tempera-
ture stays between 0 and 55C.
Attached
information
None
Precautions/
Remarks
None