Omron NX1P2 series

6 Troubleshooting
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NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
Event name NX Bus Communications Error Event code 85500000 hex
Meaning A communications error that prevents normal NX bus communications was detected.
If there are more than one NX Unit relevant to this event, only the NX Unit that is nearest to the CPU Unit is registered
with the event.
Source NX Bus Function Module Source details Master Detection
timing
Continuously
Error attributes Level Minor fault Recovery Cycle the power
supply to the
CPU Unit, reset
the Controller, or
restart the NX
bus.
Log category System
Effects User program Continues. Operation For NX Units located outside the NX Unit where an error
occurred, I/O communications will not operate and mes-
sage communications cannot be performed.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
The NX bus connector contact is
faulty due to vibration or shock.
Mount the NX Units and End Cover
securely and secure them with End
Plates.
Perform installation according to the
user's manual.
Excessive noise is applied to the NX
bus connector.
Implement noise countermeasures
according to the user's manual.
An NX Unit was removed. Mount the removed NX Unit again.
An error occurred in an NX Unit. Cycle the power supply to the rele-
vant NX Unit. If this error persists,
replace the NX Unit.
None
Attached
information
Attached information 1: Unit number of the NX Unit where the error occurred
Precautions/
Remarks
None
Event name NX Unit Communications Timeout Event code 85510000 hex
Meaning An error occurred in I/O data communications with the NX Units.
Source NX Bus Function Module Source details Master Detection
timing
Continuously
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation For NX Units with this error, I/O communications will not
operate, but message communications can be performed.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
An NX Bus Communications Error
has occurred.
Correct the NX Bus Communications
Error.
Take preventive measures against
the NX Bus Communications Error.
An error occurred in an NX Unit. Cycle the power supply to the rele-
vant NX Unit. If this error persists,
replace the NX Unit.
None
Attached
information
Attached information 1: Unit number of the NX Unit where the error occurred
Attached information 2: System information
Precautions/
Remarks
None