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

Page 200

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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 “1b”
SRTP server
event
(Continued)

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20 “LAN system-software fault; resuming”

Internal error: A work block with NULL transaction and connection machine
pointers was detected. Entry 4 contains the event code associated with the
work.

21 “Bad remote application request; discarded request”

A PDU arrived in a state in which the SRTP connection cannot handle it. Entry
4

contains a code indicating the PDU type. Valid PDU type codes are as

follows:
0 Connect Request
1 Connect Response
2 Data Request
3 Data Response
4 Unconfirmed Request
5 Error Request
6 Destinations Request
7 Destinations Response
8 Session Request
Entry 5

contains a code indicating the state of the SRTP connection. Valid state

codes are as follows:
0 IDLE
1 OPENING (TCP connection established, SRTP connection not established)
2 ESTABLISHED
3 READONLY
4 CLOSING
5 TERMINATE

22 “LAN I/F capacity exceeded; discarded request”

An SRTP connection could not be created due to either the enforcement of a
maximum limit on the number of SRTP connections (16) or system resource
exhaustion. In the latter case, other log entries should indicate the exhaustion
of such resources.

23 “LAN system-software fault; resuming”

Internal error: Failed to map a TCP endpoint identifier to a connection
machine. Entry 4 contains the offending endpoint identifier.

24 “LAN system-software fault; resuming”

Internal error: Failed to map a Backplane (PLC) Driver task identifier to a
connection machine. Entry 4 contains the offending task identifier.

25 “LAN system-software fault; resuming”

Internal error: No read was active on a transaction machine when one was
expected.

26 “Bad remote application request; discarded request”

A PDU arrived with a version field number higher than the SRTP protocol
version supported by the SRTP Server. Entry 4 contains the version number of
the PDU. Entry 5 contains the SRTP version supported by the SRTP Server.

27 “Bad remote application request; discarded request”

A PDU arrived with an invalid pdu_type field code. The value of the
pdu_type

field is contained in Entry 4. Valid PDU type codes are listed above

in the description of Entry 2 = 21H.