GE GEFanuc Automation Programmable Control Products TCP/IP Ethernet Communications for the Series 90t-70 PLC GFK-1004B User Manual

Page 188

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6-17

GFK-1004B

Chapter 6 Troubleshooting

Table 6-10. Exception Log Event Codes - Continued

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Log Event

Code

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Possible Cause and Resolution

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Event “8”
PLC Driver
events
(Continued)

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36 “Module state doesn’t permit Comm–Req; request discarded”

COMMREQs are not allowed if no Soft Switches have been received.

37 “LAN System-Software Fault; Resuming”

A task that has not registered with the Backplane driver is attempting to
send messages to the PLC.

38 (Not reported to CPU Fault Table)

A Backplane driver user ’s attempt to send a message to the PLC failed.
Entry 3

indicates the error code returned.

39 (Not reported to CPU Fault Table)

An attempt to release CPU text buffers failed. Entry 3 indicates the status
returned from the Mailbox Utilities.

40 (Not reported to CPU Fault Table)

Backplane driver ’s attempt to send a message to the PLC failed. Entry 3
indicates the status code returned from the CPU. See Tables 4–5 through
4-7 for the meaning of this status code.

41 (Not reported to CPU Fault Table)

Backplane driver could not find a state machine for an unsolicited message.

42 (Not reported to CPU Fault Table)

Backplane driver could not find a state machine for a response message.

43 (Not reported to CPU Fault Table)

Backplane driver detected that the CPU firmware revision is too low for
use with TCP/IP configuration mode (soft switches). You must either
configure your Ethernet Interface in MMS-ETHERNET configuration
mode or upgrade your CPU firmware. Entry 4 indicates your CPU’s
firmware revision level while Entry 5 indicates the revision level needed
for TCP/IP configuration mode. Unpredictable operation will result if you
operate with this error.

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Event “b”
Service Agent
events

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This event is logged when the MMS Service Agent encounters an unexpected
event.

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Entry 2

of the logged event contains one of the following error codes.

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“LAN System-Software Fault; Resuming”
Could not find the index into the Data Transfer Table. This error can occur
when sending any fault table information to the PLC CPU.

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“LAN System-Software Fault; Resuming”Backplane driver returned a bad
status. Entry 3 contains status code.

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“Backplane Communications with PLC Fault; Lost Request”
CPU Nacked a request. Entry 3: Major status. Entry 4: Minor Status.
These are error codes returned by the CPU. See Table 16 and 17 in
GFK-0582B.

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“Backplane Communications with PLC Fault; Lost Request”
A read request returned an unexpected amount of data.Entry 3 contains
the actual data size; Entry 4 contains the expected data size.

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“LAN System-Software Fault; Resuming”Unexpected “More
follows” condition was indicated by the Backplane driver.

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“Backplane Communications with PLC Fault; Lost Request”
Unexpected Unsolicited message type was received.Entry 3 contains the
message type code.

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“Backplane Communications with PLC Fault; Lost Request”
CPU NACKed a request 3 times due to congestion. Entry 3
contains the status code; Entry 4 contains additional status data.

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