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GFK-1541B Chapter 2 Installation 2-53
2
LED Pattern Where Stopped Possible Cause Corrective Actions
❍
MODULE OK OFF)
❍
LAN ONLINE (OFF)
❍
SERIAL ACTIVE (OFF)
❍
STATUS (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 the PLC rack, inspect the
Interface for loose components,
reseat the Interface, and Restart.
Try a different slot.
If the problem persists, replace the
Interface or PLC hardware.
✫
MODULE OK (Slowblink)
✫
LAN ONLINE (Slowblink)
✫
SERIAL ACT. (Slowblink)
✫
STATUS (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 A
pp
endix C.
Cycle power or press Restart
pushbutton again for less than 5
seconds to restart the Interface and
clear the load request.
✫
MODULE OK (Slowblink)
❍
LAN ONLINE (OFF)
❍
SERIAL ACT. (OFF)
❍
Status (OFF)
C
Waiting for
Configuration
from PLC
Did not configure slot using
PLC Programmer.
New CPU with no
configuration.
CPU not communicating
with Ethernet Interface
(Condition can last a
maximum of 2 minutes.)
Use configuration software to
configure the Interface then store
the configuration to the PLC CPU.
Make sure Interface is in the correct
slot on the in the PLC rack.
Power cycle the PLC.
Clear faults and Restart Interface.
✫
MODULE OK (Slowblink)
●
/
✲
/
❍
LAN ONL. (ON/Traffic/OFF)
❍
SER. ACT (OFF/Slowblink)
✫
STAT US (Slowblink)
MODULE OK and STATUS 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 PLC Programmer configuration
software to configure the Interface
with a non-zero IP address.
Use a BOOTP server to provide
Interface with a non-zero IP
Address.
✫
MODULE OK (Slowblink)
●
/
✲
/
❍
LAN ONL. (ON/Traffic/OFF)
✫
SERIAL ACT. (Slowblink)
●
/
❍
STATUS (ON/OFF)
MODULE OK and SERIAL ACTIVE
blink in unison.
E
Maintenance
Restart pushbutton until
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 re
q
uest.
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.
●
MODULE OK
(ON)
●
/
✲
/
❍
LAN ONL. (ON/Traffic/OFF)
❍
SERIAL ACTIVE (OFF)
●
/
❍
STATUS (ON/OFF)
F
Operational
If the LAN ONLINE 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 STATUS 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 STATUS LED is OFF.
*