GE 845 Instruction Manual page 144

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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.
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 845 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 845 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 845 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 845 retransmits an unsolicited response without receiving
confirmation from the master; a value of "255" allows infinite re-tries.
DNP UNSOL RESPONSE DEST ADDRESS
Range: 0 to 65519 in steps of 1
Default: 1
Sets the DNP address to which all unsolicited responses are sent. The IP address to
which unsolicited responses are sent is determined by the 845 from the current TCP
connection or the most recent UDP message.
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS