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2-10 TCP/IP Ethernet Communications User’s Manual – January 1996
GFK-1004B
Problems During Power-Up
The Ethernet Interface may not transition directly to the Operational State upon power–
up or restart. It may stop in another state or a fault may have been detected. Refer to
the table below for possible states your Ethernet Interface can assume after completion
of power-up diagnostics.
LED Pattern Where Stopped Possible Cause Corrective Actions
MODULE OK On
STATUS OK Blinking
Loader utility Interface requires a (re)load
of communications software.
Load the Communication Soft-
ware. See Procedure 4.
MODULE OK On
ONLINE Off
Operational Transceiver or transceiver
cable not (properly) con-
nected.
SQE not enabled on trans-
ceiver.
LAN Online Soft Switch* set
to NO.
Connect cable & transceiver.
Set SQE ON on transceiver in ac-
cord with manufacturer ’s
instructions.
Use LM90 configurator to set
LAN Online Soft Switch* to
“YES”. See Procedure 3.
MODULE OK On
ONLINE On
STATUS OK Off
Operational Exception condition oc-
curred.
Use the Station Manager LOG
command as explained in
Chapter 6 under the section,
“Troubleshooting When
STATUS OK LED is OFF”.
MODULE OK Blink-
ing Slowly
Soft Switch Entry utility Invalid Soft Switch Data.
Soft Switch Data checksum
invalid. System Software
detected incompatible MAC
address assignments. Cer-
tain system errors.
IP address = 0.0.0.0
Correct Soft Switch Data and
Restart or Reload Ethernet Inter-
face. See Procedures 3
and/or 4.
MODULE OK Off Power-Up/Restart Fatal Error. Inspect the Interface for loose
components, reseat the Inter-
face, and Restart. Recheck
Logicmaster 90 Configuration.
Examine PLC Fault Table for
clues. If the problem persists,
replace the Interface.
* MMS-ETHERNET configuration mode only