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Event name
NX Bus I/O Communications Stopped
Meaning
An error occurred in I/O communications between the NX bus master and an NX Unit.
Source
Depends on where the Sysmac
Studio is connected and the sys-
tem configuration.
Error attrib-
Level
utes
Effects
User program
System-de-
Variable
fined varia-
None
bles
Cause and
Assumed cause
correction
There is a hardware error in the
NX bus master or an NX Unit.
Attached in-
None
formation
Precautions/
None
Remarks
l Operation Continuation Error Related to Program Execution Function
NX-series Safety Control Unit User's Manual (Z930)
Source details NX Unit
Minor fault
Recovery
Continues.
Operation
Data type
None
Correction
If the error occurs again even af-
ter you cycle the power supply to
the NX Units, replace the NX bus
master or the NX Unit.
12 Troubleshooting
Event code
84F00000 hex
Detection tim-
ing
Cycle the pow-
Log category
er supply to the
NX bus master
and NX Units.
The NX Units will continue to operate.
•
Input data:
An error occurs in safety process data communi-
cations because refreshing is stopped. The val-
ues of the status and exposed variables in the
standard process data are not refreshed.
•
Output data:
An error occurs in safety process data communi-
cations because 0's are output.
Name
None
Prevention
None
Continuously
System
12
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Table of Contents
Troubleshooting
