Omron NX-SID Series User Manual page 348

9 Troubleshooting
TS indicator FS indicator
Green Red Green
Not Lit Not Lit -
Not Lit Not Lit -
- - FLS (1 s) Not Lit
- - Not Lit
- - -
9 - 6
Cause
Red
- No power is supplied by the Unit
power supply.
- • Waiting for initialization to start
• Restarting the Unit
The safety connections are not
established (including when they
are currently being established).
FLS (1 s) Safety Process Data Communica-
tions Timeout
- NX Message Communications Error Refer to NX Message Communica-
Corrective action
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 properly.
• Make sure that there are no breaks in
the power supply cable.
• Make sure that the power supply volt-
age is within the specified range.
• Make sure that the power supply has
enough capacity.
• 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 hardware failure. In
that case, replace the Safety I/O Unit.
Status is normal. Wait until processing
is completed.
Wait until processing is completed.
Refer to Safety Process Data Commu-
nications Timeout on page 9-39.
tions Error on page 9-46.
NX-series Safety Control Unit User's Manual (Z930)