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PLC Fault Table Descriptions
PLC Fault
User Action
Backplane communications with PLC fault;
lost request
User Action:  Check to make sure you are not sending
COMMREQs faster than the Ethernet Interface can
process them.  If problem persists, contact GE Fanuc
Automation - NA.
Bad local application request; discarded
request
User Action:  Check for valid COMMREQ command
code.  If problem persists, contact GE Fanuc Automation -
NA.
Bad remote application request; discarded
request
User Action:  Try to validate the operation of the remote
node.  If problem persists, contact GE Fanuc Automation -
NA.
Can’t locate remote node; discarded request
Error reported when message received where IP/MAC
address cannot be resolved.  Error may indicate that
remote host is not operational on the network.
User Action:  Check that remote host is operational on
network and its addresses are correct.
Comm_req - Bad task ID programmed
Message from PLC for unknown Ethernet Interface task.
User Action:  Check COMMREQ function block.
Comm_req - Wait mode not allowed
User Action:  Check COMMREQ to make sure sent in no-
wait mode.
Config’d gateway addr bad; can’t talk off local
net
Error in configuration.  Verify  IP address, Subnetwork
Mask, and default Gateway IP address are
correct.
Connection to remote node failed; resuming
without  it
Underlying communications software detects error
transferring data; resuming.  If persistent error,
check connection to LAN and operation of remote node.
LAN controller fault; restart LAN I/F
User Action:  HW fault, perform power cycle.  If  problem
persists, contact GE Fanuc Automation - NA.
LAN controller Tx underflow; attempt
recovery
Internal system error.  User Action:  If problem
persists, contact GE Fanuc Automation - NA.
LAN controller underrun/overrun; resuming
Internal system error.  User Action:  If problem
persists, contact GE Fanuc Automation - NA.
LAN data memory exhausted - check parms;
resuming
The Ethernet Interface does not have free memory
to process communications.  User Action:  If
problem persists, contact GE Fanuc Automation - NA.
LAN duplicate MAC Address; resuming
A frame was received in which  the source MAC
Address was the same as this station’s MAC Address.  All
stations on a network must have a unique MAC address.
Immediately isolate the offending station; it may be
necessary to turn it off or disconnect it from the network.
This station remains Online unless you intervene to take it
Offline.
LAN controller fuse blown; off network
(Series 90-70 Ethernet Interface (Type 2) and Series 90-
30 CPU364) 
 The network port fuse is blown; port is
unusable.  Isolate and correct the cause of the problem,
then replace the fuse or the Ethernet Interface.
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