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12 Troubleshooting
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 Safety I/O Errors
12 - 76
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.
Event code
84F10000 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 in 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
NX-series Safety Control Unit User's Manual (Z930)
Continuously
System
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Table of Contents
Troubleshooting
