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6 |
Table 6-10. Exception Log Event Codes - Continued
| Log Event |
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| Code |
| Possible Cause and Resolution |
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| Eventª8º | 36 | ªModule state doesn't permit Comm±Req; request discardedº |
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| PLCDriver |
| COMMREQs are not allowed if no Soft Switches have been received. |
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| events | 37 ªLAN |
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| (Continued) |
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| A task that has not registered with the Backplane driver is attempting to |
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| send messages to the PLC. |
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| 38 | (Not reported to CPU Fault Table) |
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| A Backplane driver user's attempt to send a message to the PLC failed. |
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| Entry 3 indicates the error code returned. |
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| 39 | (Not reported to CPU Fault Table) |
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| An attempt to release CPU text buffers failed. Entry 3 indicates the status |
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| returned from the MailboxUtilities. |
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| 40 | (Not reported to CPU Fault Table) |
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| Backplanedriver's attempt to send a message to the PLC failed. Entry 3 |
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| indicates the status code returned from the CPU. See Tables 4±5 through |
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| |
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| 41 | (Not reported to CPU Fault Table) |
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| Backplane driver could not find a state machine for an unsolicited message. |
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| 42 | (Not reported to CPU Fault Table) |
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| Backplane driver could not find a state machine for a response message. |
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| 43 | (Not reported to CPU Fault Table) |
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| Backplane driver detected that the CPU firmware revision is too low for |
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| use with TCP/IP configuration mode (soft switches). You must either |
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| configureyourEthernet |
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| mode or upgrade your CPU firmware. Entry 4 indicates your CPU's |
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| firmware revision level while Entry 5 indicates the revision level needed |
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| for TCP/IP configuration mode. Unpredictable operation will result if you |
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| operate with this error. |
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| Event ªbº | This event is logged when the MMS Service Agent encounters an unexpected |
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| ServiceAgent | event. |
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| events |
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| Entry 2 of the logged event contains one of the following errorcodes. |
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| 1 |
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| |
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| Could not find the index into the Data Transfer Table. This error can occur |
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| when sending any fault table information to the PLC CPU. |
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| 2 |
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| |
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| status. Entry 3 contains status code. |
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| 3 | ªBackplane Communications with PLC Fault;LostRequestº |
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| CPUNacked a request. Entry 3: Major status. Entry 4: Minor Status. |
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| These are error codes returned by the CPU. See Table 16 and 17 in |
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| 4 | ªBackplane Communications with PLC Fault;LostRequestº |
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| A read request returned an unexpected amount of data.Entry 3 contains |
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| the actual data size; Entry 4 contains the expected data size. |
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| 5 |
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| followsº condition was indicated by the Backplane driver. |
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| 6 | ªBackplane Communications with PLC Fault;LostRequestº |
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| Unexpected Unsolicited message type was received.Entry 3 contains the |
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| message type code. |
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| 7 | ªBackplane Communications with PLC Fault;LostRequestº |
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| CPUNACKed a request 3 times due to congestion. Entry 3 |
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| contains the status code; Entry 4 contains additional status data. |
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Chapter 6 Troubleshooting |