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Using the LED Indicators and Display for Troubleshooting Section 14-2
Errors Related to the
Network
The 7-segment display alternates between the node address and error code.
Indicator Error Cause Unit operation (Flag
status)
Error
log
(hex)
Countermeasure
MS NS 7-segment
--- --- E1 Ethernet Link
Not Detected
The link with the
switching hub
could not be
detected.
Note This error
will not
occur
when
data links
are not
set for
version
2.0 or
higher.
• The Unit will be
offline and unable to
communicate. Errors
will be returned to all
communications
requests.
• Data exchanges
(refreshing) will con-
tinue with the CPU
Unit.
The Unit Error
Occurred Flag (n+10,
bit 00), Network Error
Occurred Flag (n+10,
bit 01), and Link OFF
Error Flag (n+10, bit
09) will go ON.
The Link Status Flag
(n+13, bit 14) will go
OFF.
03D3 Check the follow-
ing items:
• Is the cable con-
nected?
• Is the cable dam-
aged or loose?
• Is there excessive
noise?