Omron NX-SID Series User Manual page 372

9 Troubleshooting
Event name NX Bus I/O Communications Stopped
Meaning An error occurred in I/O communications between the Communications Coupler Unit and an NX Unit.
Source Depends on where the Sysmac Stu-
dio is connected and the system con-
figuration.
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
There is a hardware error in the Com-
munications Coupler Unit or an NX
Unit.
Attached None
information
Precautions/ None
Remarks
9 - 30
Source details
Minor fault Recovery
Continues. Operation
Data type
None
Correction
If the error occurs again even after
you cycle the power supply to the NX
Units, replace the Communications
Coupler Unit or NX Unit.
Event code 84F0 0000 hex
NX Unit Detection timing
Cycle the power Log category
supply to the
EtherCAT Cou-
pler Unit and NX
Units.
The NX Units will continue to operate.
Input data: An error occurs in safety process data com-
munications because refreshing is stopped.
The values of the status and exposed vari-
ables in the standard process data are not
refreshed.
Output data: An error occurs in safety process data com-
munications because 0's are output.
Name
None
Prevention
None
NX-series Safety Control Unit User's Manual (Z930)
Continuously
System