Omron NJ501-1400 User Manual page 220

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