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2-28 TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual
–
May 2002 GFK-1541B
2
LED Pattern Where Stopped Possible Cause Corrective Actions
❍
EOK
(OFF)
❍
LAN
(OFF)
❍
STAT (OFF)
A
Hardware
Failure
Fatal Hardware Error.
Make sure the PLC has power.
Examine PLC Fault Table for
clues.
Recheck PLC Programmer
configuration.
Power off baseplate, inspect the
Interface for loose components,
reseat the module, and Restart.
If the problem persists, replace
the PLC hardware.
✫
EOK (Slowblink)
✫
LAN
(Slowblink)
✫
STAT (Slowblink)
All LEDs blink in unison.
B
Software
Loader
Restart pushbutton until the
bottom LED turns ON.
Station Manager LOAD
command issued.
Software corrupt.
Connect a PC Software Loader
and load new software. See
Appendix C.
Cycle power or press Restart
pushbutton again for less than 5
seconds to restart the Interface
and clear the load request.
✫
EOK
(Slowblink)
❍
LAN
(OFF)
❍
STAT (OFF)
C
Waiting for
Configuration
from PLC
Did not configure slot using
the PLC Programmer.
CPU not communicating
with Ethernet Interface.
(Condition can last a
maximum of 2 seconds.)
Use the PLC Programmer
configuration software to
configure the Interface then store
the configuration to the PLC
CPU.
Power cycle the PLC.
Clear faults and Restart Interface.
✫
EOK (Slowblink)
●
/
✲
/
❍
LAN
(ON/Traffic/OFF)
✫
STAT (Slowblink)
EOK and STAT blink in unison.
D
Waiting for IP
Address
Interface’s IP address has not been
configured or has been configured
as 0.0.0.0.
Use the PLC Programmer to
configure the Interface with a
non-zero IP address.
Use a BOOTP server to provide
Interface with a non-zero IP
address.
✫
EOK (Slowblink)
●
/
✲
/
❍
LAN (ON/Traffic/OFF)
●
/
❍
STAT(ON/OFF)
E
Maintenance
Restart pushbutton until the
bottom two LEDs turn ON.
Station Manager MAINT
command issued.
Internal System Error when
Interface was Operational
caused a restart and
entrance into Maintenance.
If you did not intend to enter
Maintenance press the Restart
pushbutton for less than 5
seconds. This clears the
Maintenance request.
Examine PLC Fault Table for
clues.
If you need to use the Station
Manager to troubleshoot a
problem, see GFK-1186, TCP/IP
Ethernet Communications for the
Series 90 PLC Station Manager
Manual.
●
EOK (ON)
●
/
✲
/
❍
LAN (ON/Traffic/OFF)
●
/
❍
STAT(ON/OFF)
F
Operational
If the LAN LED is OFF, the
problem may be:
Network cable not
connected or transceiver not
connected to Interface or
bad transceiver.
Network cable not
terminated properly.
SQE not enabled on
transceiver.
If the STAT LED is OFF, an
exception condition has occurred.
Connect cable and transceiver
properly. Replace transceiver.
Terminate network cable
properly.
Set SQE ON on transceiver in
accord with manufacturer’s
instructions.
Examine PLC Fault Table to find
out why the STAT LED is OFF.