GE GFK-1004B user manual Exception Log Event Codes

6

Table 6-10. Exception Log Event Codes - Continued

Log Event
Code		Possible Cause and Resolution
Eventª8º	22	ªBackplane communications with PLC fault; lost requestº
PLCDriver		QAlloc call failed. Entry 4 contains the byte size requested.
events	23	ªBackplane communications with PLC fault; lost requestº
(Continued)
		BuffAlloc call failed. Entry 4 contains the byte size requested.

24ªBackplane communications with PLC fault; lost requestº

Circular mail queue is full and incoming message from the PLC CPU was lost. Entry 4 contains the number of lost entries so far.

25ªLANI/FCapacityExceeded; Discarded Requestº

A Dual Port Memory allocation attempt for a given length failed. Entry 4 contains the length of the allocation.

26ªLANSystem-SoftwareFault; Resumingº

An attempt was made to free a Dual Port Memory buffer that is out of range.

27ªLANSystem-SoftwareFault; Resumingº

An attempt was made to free a Dual Port Memory buffer that is not allocated.

30ªBackplane communications with PLC fault; lost requestº

Could not generate work queue entry. Entry 4 contains the event that was trying to be scheduled, which is one of the following:

Entry 4 Description

1Mail message received from PLC

2Ethernet Interface timed out waiting for a response from the CPU

3Received mail message for diagnostics task

4Circular queue full, mail message dropped

5Retrying VME mailboxinitialization

Entry 5 contains additional information related to the event type.

Entry 5 Interpretation

1Ethernet Interface task ID to which message was sent

2Index into Data Transfer table of transaction

3Ethernet Interface task ID to which message was sent

4Number of messages dropped so far

5Number of open attempts so far

31ªBackplane communications with PLC fault; lost requestº

Backplane Driver scheduled with illegal event. Entry 4 contains the event codereceived.

32ªModule state doesn't permit Comm±Req; request discardedº Illegal COMMREQ from application program was discarded. Entry 4 contains the command code received.

33ªModule state doesn't permit Comm±Req; request discardedº COMMREQ received outside of normal system operation (e.g., while in the Soft Switch Entryutility).

34ªLANSystem-SoftwareFault; Resumingº

Backplane Driver initializing without Soft Switches from the CPU. This will occur if the LAN Interface is not configured in the PLC via the Logicmaster90-70ConfigurationSoftware.

35ªLANSystem-SoftwareFault; Resumingº

Series 90-70 Ethernet Interface/CPUcommunicationstimeoutduring restart or load.

6-16 TCP/IP Ethernet Communications User's Manual ± January 1996 GFK-1004B