Omron sysmac NX Series User Manual page 636

15 Troubleshooting
TS In- NS In-
dica- dica-
tor tor
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1-sec-
ond in-
terval
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2-sec-
ond in-
terval
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15-36
Sev-
en-
FS In-
P ERR In- seg-
dica-
dicator ment
tor
Indi-
cator
[L3]
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NX-series Safety Control Unit/Communication Control Unit User's Manual (Z395)
Cause
An error has occurred in the
software.
NX Bus I/O Communications
Stopped
NX Unit I/O Communications
Error
•
Initializing
•
Downloading
No power is supplied by the
Unit power supply.
•
Waiting for initialization to
start
•
Restarting the Unit
Corrective action
Cycle the power supply. If the
error reoccurs, contact your
OMRON representative.
Refer to NX Bus I/O Commu-
nications Stopped ( page
15-185).
Refer to NX Unit I/O Commu-
nications Error ( page
15-178).
Status is normal. Wait until
processing is completed.
Check the following items
and make sure that power is
correctly supplied from the
Unit power supply.
Checks Related to the Power
Supply
•
Make sure that the power
supply cable is wired prop-
erly.
•
Make sure that there are
no breaks in the power
supply cable.
•
Make sure that the power
supply voltage is within the
specified range.
•
Make sure that the power
supply has enough capaci-
ty.
•
Make sure that the power
supply has not failed.
If you cannot resolve the
problem after you check the
above items and cycle the
Slave Terminal power supply,
the Unit may have a hard-
ware failure. In that case, re-
place the Safety CPU Unit.
Status is normal. Wait until
processing is completed.