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6
6-15
GFK-1004B
Chapter 6 Troubleshooting
Table 6-10. Exception Log Event Codes - Continued
Log Event
Code Possible Cause and Resolution
Event “8”
PLC Driver
events
This event is logged by the PLC Backplane Driver when an unexpected event
occurs. Entries 1 and 6 of the event log will be zero. For some events, Entries
3, 4 and 5 will give more information on the event.
Entry 2 of the event log is an exception code which indicates what error oc-
curred. In general, Entry 2 codes 1 - 1F are PLC backplane communication
faults, codes 20 - 2F are resource errors, and codes 30 and up are miscellaneous
errors. Entry 2 may have the following values.
1 “LAN System-Software Fault; Resuming”
Could not open VME mailbox. Entry 4 contains the status returned from
the MBU_OPEN routine. Entry 5 contains the number of open attempts
we made.
2 “LAN System-Software Fault; Resuming”
Could not enable interrupt capability for incoming mail. Entry 4 contains
the returned status from the MBU_ENAB_INT routine.
3 “LAN System-Software Fault; Resuming”
Mail packets from PLC for a read response are out of order. Entry 4
contains the received packet sequence number. Entry 5 contains the
expected packet sequence number.
4 “LAN System-Software Fault; Resuming”
PLC completed a response earlier than expected. Entry 4 contains the
current transfer state.
5 “LAN System-Software Fault; Resuming”
Message from PLC for unknown Ethernet Interface task. Entry 4 contains
the task ID received from the PLC.
6 “LAN System-Software Fault; Resuming”
Received PLC response for unknown request. Entry 4 contains the
mailbox sequence number of the stray response.
7 “LAN System-Software Fault; Resuming”
Bad message type from PLC. Entry 4 contains the message type code
received.
8 “LAN System-Software Fault; Resuming”
Timed out waiting for PLC response. Entry 4 contains the mailbox
sequence number for this transaction. Entry 5 contains the transfer state
when the timeout occurred. This problem may occur due to the Ethernet
Interface being asked to perform beyond its capacity. Try transferring less
data per message or establishing fewer simultaneous connections.
9 “LAN System-Software Fault; Resuming”
CPU completed program download before Ethernet Interface was ready.
A “LAN System-Software Fault; Resuming”
CPU still wants program upload data when Ethernet Interface finished.
20 “LAN I/F can’t init-check parms; r unning soft Sw utl”
QCreate call failed.
21 “LAN I/F can’t init-check parms; r unning soft Sw utl”
PoolAlloc call failed.