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2-14 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
❍
OK
(OFF)
❍
LAN
(OFF)
❍
FDX (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 Interface, and Restart.
Try a different slot.
If the problem persists, replace the
Interface or PLC hardware.
✫
OK
(Slowblink)
✫
LAN
(Slowblink)
✫
FDX (Slowblink)
✫
STAT (Slowblink)
All LEDs blink in unison.
B
Software
Loader
Restart pushbutton until
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.
✫
OK (Slowblink)
❍
LAN (OFF)
❍
FDX (OFF)
❍
STAT (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 PLC Programmer configuration
software to configure the Interface
then store the configuration to the
PLC CPU.
Make sure Interface is in the correct
slot on the baseplate.
Power cycle the PLC.
Clear faults and Restart Interface.
✫
OK (Slowblink)
●
/
∗
/
❍
LAN (ON/Traffic/OFF)
❍
FDX (OFF/Slowblink)
✫
STAT (Slowblink)
OK 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 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.
✫
OK (Slowblink)
●
/
∗
/
❍
LAN
(ON/Traffic/OFF)
✫
FDX (Slowblink)
●
/
❍
STAT (ON/OFF)
OK and SER blink in unison.
E
Maintenance
Restart pushbutton pressed
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 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.
●
OK
(ON)
●
/
∗
/
❍
LAN
(ON/Traffic/OFF)
●
/
❍
FDX(ON/OFF)
1
●
/
❍
STAT (ON/OFF)
1
FDX should be ON if Full
Duplex mode is activated;
otherwise, it should be OFF.
F
Operational
If the LAN LED is OFF,
the problem may be:
Network cable 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. *
* Identify the PLC fault message using the PLC Programmer, then refer to Table 8-1 in Chapter 8 for corrective actions.