S&C 5800 Series, Руководство по устранению неисправностей

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S&C Instruction Sheet 1041-550
IntelliLINK
Time Sync Req
This field shows the number of requests made for timestamps by toggling the associated
IIN bit on.
Bad Pkt Seq
This field shows the number of mismatched application layer sequence numbers that were
received in packets.
Bad Fir/Fin
This field shows the number of packets received with the Fir and Fin bits set improperly.
Xmit Delay
This field shows the number of times that the transmit of a packet was delayed due to
interrupt or data link layer activity. A large number in this field does not indicate a problem,
although a problem may exist if the number is continuously incrementing.
Defr Rd Lost
This field counts the number of deferred-read requests that were overwritten by subse-
quent deferred reads. DNP requires that the switch control defer simple read requests if
it is waiting to receive confirmation from the master station for an outstanding eventdata
response message.
Other Err
This field shows the number of unidentified errors encountered.
These are errors associated with the data link layer of DNP communications.
App Layer Busy
This field shows the number of times a confirmed user data packet was received into the
data link layer but could not be delivered to the application layer due to existing applica-
tion layer activity. Confirmed packets that cannot reach the application layer cause an ack
confirmation to be sent to the sender of the packet.
Unconf Fail
This field shows the number of times an unconfirmed user data packet was received into
the data link layer but could not be delivered to the application layer due to existing applica-
tion layer activity. These unconfirmed packets are dropped, without notifying the sender.
FCB Mismatch
This field shows mismatch occurrences of the Frame Control Bit (FCB) in the data link layer.
Data Link Layer
Counts