6

Table 6-10. Exception Log Event Codes - Continued

Log Event

 

Code

Possible Cause and Resolution

Eventªcº

120* ªLAN Controller Fault;RestartedLANI/Fº

LLC events

or

(Continued)

121* ªLAN Interface Hardware Failure; Switched Off Networkº:

 

Fuse F1 on the LAN Controller board, which protects the PLC Power

 

Supply from overload from the externaltransceiver, is blown.. This fuse is

 

not field replaceable. Correct the external fault and replace the LAN

 

Controllerboard.

 

122* ªLAN Controller Fault;RestartedLANI/Fº

 

or

 

23* ªLAN InterfaceHardwareFailure; Switched Off Networkº:

 

 

 

The MAC chip failed its internal loopback test. Replace the LAN

 

Controllerboard.

 

124* ªLAN Controller Fault;RestartedLANI/Fº

 

or

 

125* ªLAN Interface Hardware Failure; Switched Off Networkº:

 

The MAC chip failed to initialize. Replace the LAN Controller Board.

 

126*ªLANControllerFault;RestartedLANI/Fº

 

or

 

127* ªLAN Interface Hardware Failure; Switched Off Networkº

 

The MAC reported a ªbabbleº fault; more than 1518 bytes of data have

 

been transmitted in a frame. Replace the LAN Controller board.

 

128* ªLAN Controller Fault;RestartedLANI/Fº

 

or

 

129* ªLAN Interface Hardware Failure; Switched Off Networkº :

 

TheMAC reported a handshaking error in accessing the LAN Controller

 

memory. Replace the LAN Controller board.

 

12a* ªLANControllerFault;RestartedLANI/Fº

 

or

 

12b* ªLAN Interface Hardware Failure; Switched Off Networkº:

 

The MAC reported a broken ªchainº of buffers in a transmit frame. Since

 

the LAN Controller does not chain buffers, this should not occur. Replace

 

the LAN Controller board. If this fault recurs, please report it to GE Fanuc.

 

* Same fault for both reports. It is remotely possible that error codes

 

120 - 12b may occur due to a transient system fault. Because of this

 

possibility, an attempt is made to recover without manual intervention, by

 

restarting the LAN Controller (thus rerunning power±up diagnostics). If a

 

hardware fault is detected, the LAN Controller will be held in reset. To

 

prevent repeated restarts and to protect the network, the LAN IF will

 

instead Switch Offline from the Network (rather than Restart) if this fault

 

occurs within 5 minutes of startup.

 

 

6-20

TCP/IP Ethernet Communications User's Manual ± January 1996

GFK-1004B

Page 191
Image 191
GE GFK-1004B user manual Exception Log Event Codes