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Table 6-10. Exception Log Event Codes - Continued
Log Event
Code
Possible Cause and Resolution
Eventªcº LLC events
This event is logged when the LLC layer encounters an unexpected condition. Entry 2 of the logged event contains the error code as shown below.
102ªLANTransceiverFault;AttemptingRecoveryº:
Either the Transceiver or Transceiver cable failed or became disconnected. Reattach the cable or replace the Transceiver or cable. If SQEErr is incrementingbutLostCarr is not, the Transceiver SQE±test switch may be set incorrectly. Transceivers used on GEnet must have the IEEE 802.3 SQE_TEST enabled. Use the TALLY L cmd to distinguish whether the SQE test, done on each transmitted frame, failed (SQEErr) or the transceiver lost carrierwhiletransmitting(LostCarr). Online operation should resume within 10 seconds after repair.
103ªLAN Data Memory Exhausted ± Check Parms;Resumingº:
The MAC device discarded a receive frame because there was no buffer to receive the frame into. More input buffers should be allocated to the MAC by increasing the parameter lrxringlen. The TALLY L cmd will distinguish whether there were simply no receive buffers (MisdPack) or an excessively long frame that required chaining of multiple buffers (RbufErr).
105ªLANControllerTxUnderflow; AttemptingRecoveryº:
During transmission, the MAC was unable to get data from memory quickly enough. This indicates a LAN Controller design flaw; it should not occur. This error may cause loss of both tx and rx messages that are in process, since the MAC must be reinitialized (done automatically). Online operation should resume within 10 seconds after repair.
106ªBadRemoteApplicationRequest;DiscardedRequestº:
An incoming frame was received that exceeded the size specified by the parameter, lmaxdb. For frame types other than TEST frames, the frame was discarded; for TEST frames, the data within the frame was discarded and the frame was processed without data. Check the remote (sending) station for correct frame length. If the local station must correctlyreceiveframes of large size, it will be necessary to increase the parameters lmaxdband bbuff4and possibly reallocate data memory via balloc1,balloc2,balloc3, and balloc4. Consult GE Fanuc if you need assistance.
107ªBad Remote Application Request; Discarded Request º:
An unsolicited XID response frame was received. This can be caused by a protocolerror in a remote station.
108ªBadRemoteApplicationRequest;DiscardedRequestº:
An unsolicited TEST response frame was received. This is usually caused when a remote station responds too slowly to a TEST Station Manager command from the reporting station. Increase the value of the TEST <sch> parameter. If the problem persists and the reporting station is not sending a TEST cmd, then some remote station on the network is generating a protocol error.
TCP/IP Ethernet Communications User's Manual ± January 1996 |
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