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9 Troubleshooting
NX-series Digital I/O Unit User’s Manual (W521)
9-3 Checking for Errors and Troubleshooting on the Support Software
9
9-3-4 Meaning of Error
Event name NX Unit Output Synchronization Error Event code 80210000 hex
Meaning An output synchronization error occurred in the NX Unit.
Source Depends on where the Support
Software is connected and the
system configuration.
Source details NX Unit Detection
timing
Continuously
Error
attributes
Level Minor fault Log category System
Recovery For the NX bus of CPU Units
Reset the error in the NX Bus Function Module.
For Communications Coupler Units
Reset all of the errors in the Controller.
Effects
User program
Continues. Operation The NX Unit will continue to operate.
Input data: Updating input values stops.
Output data: The output values depend on the Load
Rejection Output Setting.
Sys-
tem-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
For the NX bus of CPU Units
I/O refreshing on the NX bus is
not performed normally due to an
error in the CPU Unit.
Check the error that occurred in
the CPU Unit and perform the
required corrections.
Take preventive measures against
the error that occurred in the CPU
Unit.
For Communications Coupler Units
The communications cable con-
nected to the Communications
Coupler Unit is broken or the con-
nection is faulty.
Replace the communications
cable or wire the cable correctly.
Wire the communications cable
correctly.
The communications cable is
affected by noise.
Set the Consecutive
Communications Error Detection
Count parameter for the
Communications Coupler Unit to a
suitable value that will not cause
problems in operation.
Implement noise
countermeasures if there is
excessive noise.
Implement noise
countermeasures. Refer to the
operation manuals for the specific
Units for noise countermeasures.
Attached
information
None
Precautions/
Remarks
None
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