S&C Instruction Sheet 1041-550 27
IntelliLINK
This screen includes the following fields:
Date/Time
This is the date and time when the event occurred.
Reason for Communications Malfunction
This is the reason that communications was not achieved. If a message malfunctions at
the data link layer of PG&E SCADA, one of the following messages appears (including
the port if applicable):
• “Packet CRC Error”
• “Internal: Bad UART interrupt”
• “Packet size inconsistent with command”
• “Packet size illegal”
• “Packet size too small for this command”
• “Packet contains bad characters/framing”
One of the following messages appears for application layer events:
• “Invalid function code or command received”
• “Control requested on invalid channel”
• “Channel not selected before operate”
• “Control selection timed out”
• “Control selection followed by non-operate”
• “Unsupported ordinal read/write request”
• “Ordinal read from/write to invalid memory”
• “Scan request contains bad sequence number”
• “Scan by table request w/bad table number”
• “Control requested while in LOCAL mode”
• “Switch not ready for one-shot to lockout”
Fnc
This is the PG&E SCADA function code for this communications malfunction. It can
provide additional information about the packet received. For more details, see PG&E
SCADA protocol documentation.
Cmd
This is the PG&E SCADA command code for this communications malfunction. It can
provide additional information about the packet received. For more details, see PG&E
SCADA protocol documentation.
The TROUBLESHOOTING: Various Counters screen (Figure 12) contains counters and
statistics associated with DNP communications.
To display the TROUBLESHOOTING: Various Counters screen:
Click the Troubleshooting button at any IntelliLINK screen, then click the Various
Counters button.
Various Counters
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