8 Troubleshooting
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NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
Event name NX Unit I/O Communications Error Event code 80200000 hex
Meaning An I/O communications error occurred in an 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
When Fail-soft Operation Is Set to Stop
Reset the error in the NX Bus Function Module.
When Fail-soft Operation Is Set to Fail-soft
Reset the error in the NX Unit.
For Communications Coupler Units
When Fail-soft Operation Is Set to Stop
If the errors are detected in the Controller, reset all of the errors in the
Controller.
If the errors are not detected in the Controller, reset errors in the Com-
munications Coupler Unit and NX Unit.
When Fail-soft Operation Is Set to Fail-soft
Reset errors in the Communications Coupler Unit and NX Unit.
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 --- ---
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