CHAPTER 4: DNP PROTOCOL DNP COMMUNICATION
8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE 4-5
DNP CHANNEL 1 PORT
Range: NONE, NETWORK - TCP, NETWORK- UDP
Default: NONE
DNP CHANNEL 2 PORT
Range: NONE, NETWORK - TCP, NETWORK- UDP
Default: NONE
The DNP Channel 1 Port and DNP Channel 2 Port settings select the communications
port assigned to the DNP protocol for each channel. When this setting is set to “Network
- TCP,” the DNP protocol can be used over TCP/IP on channels 1 or 2. When this value is
set to “Network - UDP,” the DNP protocol can be used over UDP/IP.
FAST PATH:
If the additional communication module is not present, only RS485 is a possible option. The
Network options are hidden in this case and the DNP channel is assigned to the RS485 port
by default.
DNP ADDRESS
Range: 0 to 65519 in steps of 1
Default: 65519
Sets the DNP slave address. This number identifies this 8 Series relay on a DNP
communications link. Each DNP slave should be assigned a unique address.
DNP NETWORK CLIENT ADDRESS 1(2)
Range: Standard IP Address
Default: 0.0.0.0
The DNP Network Client Address settings can force the 8 Series relay to respond to a
maximum of two specific DNP masters.
DNP TCP/UDP PORT NUMBER 1 (2)
Range: 1 to 65535 in steps of 1
Default: 20000
The DNP NETWORK CLIENT ADDRESS 1(2) and DNP TCP/UDP PORT NUMBER 1(2) settings
are available only if the communications card is present. “DNP Channel 1 Port” takes the
“Port Number 1” and “Client Address 1” to allow or reject connections. The same relation
is used by channel 2.
DNP UNSOL RESPONSE FUNCTION
Range: Enabled, Disabled
Default: Disabled
Should be “Disabled” for RS485 applications since there is no collision avoidance
mechanism. Unsolicited response settings is hidden if the communication card is not
present, as DNP runs only on RS485 in this case.
DNP UNSOL RESPONSE TIMEOUT
Range: 0 to 60 s in steps of 1 s
Default: 5 s
Sets the time the 8 Series relay waits for a DNP master to confirm an unsolicited
response.
DNP UNSOL RESPONSE MAX RETRIES
Range: 1 to 255 in steps of 1
Default: 10
Sets the number of times the 8 Series relay retransmits an unsolicited response without
receiving confirmation from the master; a value of “255” allows infinite re-tries.
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