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6 Troubleshooting
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
6-2 Troubleshooting
6
6-2-4 Error Descriptions
*1 For details, refer to I/O Operation for Major Fault Level Controller Errors on page 6-8.
*1 For details, refer to I/O Operation for Major Fault Level Controller Errors on page 6-8.
Errors for Self Diagnosis
Event name DIP Switch Setting Error Event code 00090000 hex
Meaning An error was detected in the DIP switch setting.
Source PLC Function Module Source details None Detection
timing
At power ON or
Controller reset
Error attributes Level Major fault Recovery Cycle the power
supply.
Log category System
Effects User program Stops. Operation
Stops.
*1
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
There is an error in the DIP switch
setting.
Turn OFF all pins on the DIP switch. Make sure that the DIP switch set-
tings are correct.
Attached
information
Attached information 1: DIP switch readout value (00000000 hex to 0000000F hex)
Precautions/
Remarks
None
Event name Internal Bus Check Error Event code 000D0000 hex
Meaning A fatal error was detected on the internal bus.
Source PLC Function Module Source details None Detection
timing
Continuously
Error attributes Level Major fault Recovery Cycle the power
supply.
Log category System
Effects User program Stops. Operation
Stops.
*1
A connection to the Sysmac Studio may not be
possible.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
Conductive material has gotten
inside.
If there is conductive material nearby,
blow out the CPU Unit with air.
Do not do any metal working in the
vicinity of the control panel. Also,
make sure that the operating environ-
ment is free of dirt and dust. Close the
control panel.
Noise
• There is data corruption in bus sig-
nals.
• There is malfunctioning in bus inter-
face circuits.
If the error occurs even after making
the above correction, check the FG,
and power supply lines, and other
noise entry paths, and implement
noise countermeasures as required.
Implement noise countermeasures.
The CPU Unit has failed.
• The internal bus is disconnected.
If this error persists even after you
make the above two corrections,
replace the CPU Unit.
None
Attached
information
Attached information 1: System information
Precautions/
Remarks
When this error occurs, the CPU Unit stops and the error is recorded in the event log. If cycling the power to the Con-
troller clears the error, you will be able to see whether this error occurred by checking the event log. However, a restart
is sometimes not possible depending on the error location.
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