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1MRS757820 B
Section 4
4.1
4.1.1
4.1.2
Recloser Protection and Control RER615
Communication Protocol Manual
DNP3 parameters
Parameter descriptions
Link parameters
DNP physical layer configures DNP3 for the TCP/IP or serial channel.
Unit address is the slave 16 bit link address. This value should be set between 1
and 65519, since DNP3 reserves the top 16 addresses. All DNP3 devices sharing
the same network should have unique addresses.
Master address is the 16 bit link address at which the initial unsolicited message is
sent. The value should be unique, between 1 and 65519.
Serial port configures DNP3 for the selected serial channel only if DNP3 physical
layer is set for Serial. The serial port speed is set under Communication/COM1
and Communication/COM2.
Data link confirm enables or disables the data link confirmation. Options are:
never, only for multi-frame, messages or always. Option never is recommended in
DNP Technical Bulletin 1998 0402.
Data link confirm TO is the data link confirmation timeout in milliseconds.
Data link retries is the data link retry count from 0 to 65535.
Data Link Rx to Tx delay is the turnaround delay in milliseconds of the slave
replies. The timer starts at the trailing edge of the master's request.
Data Link inter char delay is the allowed inter character delay for incoming
messages. The timer starts with the reception of each character. When the timer
expires because no additional characters have been received, the IED regards the
incoming message complete. The unit of measure is a character time at the selected
baud rate.
Application layer parameters
When App layer confirm is disabled, the IED requests application confirmation for
event messages only. When it is enabled, the IED also requests application
confirmations for all the sent application.
App confirm TO is the application layer confirmation timeout in milliseconds.
Application layer confirmations received from the master after App confirm TO
has expired are not acknowledged by the IED.
Section 4
DNP3 parameters
19
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