Omron PROFINET NX-PNC202 User Manual page 231

 Troubleshooting the Primary Errors That Are Displayed with the IO PWR Indi-
cators
The IO PWR indicator shows the status of the IO power supply.
IO
PWR
Green
Lit ---
Not Lit No power is supplied by the IO power
supply.
 Troubleshooting the Primary Errors That Are Displayed with the L/A P1 and
L/A P2 Indicators
The L/A P1 and L/A P2 indicators show the status of the port activity.
L/A P1
L/A P2
Green
Lit A link was established in the physical
layer.
Blink- Link present and communicating.
ing
Not Lit A link was not established in the physi-
cal layer.
The host IO Controller is not operating.
If you cannot resolve the problem after you check the above items and cycle the Unit power supply,
there may be a hardware failure. In that case, replace the PROFINET Coupler Unit.
NX-series PROFINET Coupler Unit User's Manual (W623)
Cause
--- (This is the normal status.)
Check the following items and make sure that power is cor-
rectly supplied from the IO power supply.
Checks related to the IO 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 voltage is within the
specified range.
• Make sure that the power supply has enough capacity.
• Make sure that the power supply has not failed.
Cause
--- (The Coupler Unit is in standby status after the link was
established in the physical layer. Wait until processing is
completed.)
--- (This is the normal status.)
Check the following items, and then restart the IO Device
Terminal based on the specifications of the connected
PROFINET IO Controller.
Items Related to the Communications Cable
• Make sure that the communications cable is wired prop-
erly.
• Make sure that there are no breaks in the communica-
tions cable or loosening in the mating parts.
• Make sure that the cable is of the appropriate length.
• Make sure that the communications cable meets the rec-
ommended specifications.
Make sure that the operation of the PROFINET IO Control-
ler is correct.
12 Troubleshooting
Corrective action
Corrective action
12
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