S&C Instruction Sheet 1041-550 29
IntelliLINK
Application Layer
Counts
Bad Address
is field shows the number of packets that were received with a destination address that
does not match the RTU address of the local switch control.
Bad Preamble
This field shows the number of packets that were received without the required 2-byte
DNP packet preamble of 0564 hex.
Bad Length
This field displays the number of packets that were received with an invalid length. Invalid
packet lengths are values less than five.
Bad Framing
This field shows the number of times the UART received an improperly framed byte.
Rcv Busy
This field shows the number of times a packet was unable to be received due to a busy
receive channel.
Xmt Busy
This field shows the number of times a packet was unable to be transmitted due to a busy
transmit channel.
These are errors associated with the application layer of DNP communications.
Bad Function
This field shows the number of times an invalid or unsupported function code was received.
Bad Object
This field shows the number of times an invalid or unsupported object code was received.
Bad Pkt Param
This field shows the number of times an invalid or unsupported packet parameter was
received. Packet parameters include the variation, qualifier, and indexing associated with
the object.
Comm in Local
This field shows the number of times that Remote mode was changed to Local mode dur-
ing communications.
Rcvd Broadcast
This field shows the number of times a packet containing the broadcast destination address
was received.
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