GE D30 Instruction Manual page 172

PRODUCT SETUP
The DNP improves upon many master-slave protocols by improving overall communication performance requirements
and provides time-stamping with millisecond accuracy.
The D30 supports the Distributed Network Protocol (DNP) version 3.0. DNP is enabled when the
 COMMUNICATIONS  PROTOCOL
multiple DNP masters (usually an RTU or a SCADA master station). Since the D30 maintains two sets of DNP data change
buffers and connection information, two DNP masters can actively communicate with the D30 at one time.
See the UR Series Communications Guide for more information on DNP.
The DNP Channels sub-menu is shown.
SETTINGS  PRODUCT SETUP  COMMUNICATIONS  DNP PROTOCOL  DNP CHANNELS
 DNP CHANNELS

The
DNP CHANNEL 1 PORT
for each channel. Once DNP is assigned to a serial port, DNP is the only protocol running on that port; Modbus or IEC
60870-5-103 are disabled. If DNP is assigned to RS485, the protocol must be set to DNP on the serial port configuration as
well, for the change to take effect. When the
protocol can be used over TCP/IP on the Ethernet ports. When this value is set to "Network - UDP," the DNP protocol can be
used over UDP/IP on channel 1 only.
Changes to these port settings take effect when power has been cycled to the relay.
5
Do not set more than one protocol to the same TCP/UDP port number, as this results in unreliable operation of
those protocols.
NOTE
The setting is the DNP slave address. This number identifies the D30 on a DNP communications link. Assign a
DNP ADDRESS
unique address to each DNP slave.
The D30 can specify a maximum of five clients for its DNP connections. These are IP addresses for the controllers to which
the D30 can connect. The settings follow.
SETTINGS  PRODUCT SETUP  COMMUNICATIONS  DNP PROTOCOL  DNP NETWORK CLIENT ADDRESSES
 DNP NETWORK
 CLIENT ADDRESSES
The
DNP TCP/UDP PORT NUMBER
takes effect when the D30 is restarted.
The
DNP UNSOL RESPONSE FUNCTION
mechanism. The
DNP UNSOL RESPONSE TIMEOUT
response. The
DNP UNSOL RESPONSE MAX RETRIES
unsolicited response without receiving confirmation from the master; a value of "255" allows infinite re-tries. The
UNSOL RESPONSE DEST ADDRESS
solicited responses are sent is determined by the D30 from the current TCP connection or the most recent UDP message.
The DNP scale factor settings are numbers used to scale analog input point values. These settings group the D30 analog
input data into the following types: current, voltage, power, energy, power factor, and other. Each setting represents the
scale factor for all analog input points of that type. For example, if the
all DNP analog input points that are voltages are returned with values 1000 times smaller (for example, a value of 72000 V
on the D30 is returned as 72). These settings are useful when analog input values must be adjusted to fit within certain
5-40
setting is set to DNP 3.0. The D30 can be used as a DNP slave device connected to
DNP CHANNEL 1 PORT:

NONE
DNP CHANNEL 2 PORT:

NONE
and settings select the communications port assigned to the DNP protocol
DNP CHANNEL 2 PORT
DNP CHANNEL 1(2) PORT
CLIENT ADDRESS 1:

0.0.0.0
CLIENT ADDRESS 5:

0.0.0.0
setting is for normal DNP operation. To close the port, set the port number to 0. The change
is set to "Disabled" for RS485 applications since there is no collision avoidance
sets the time the D30 waits for a DNP master to confirm an unsolicited
setting determines the number of times the D30 retransmits an
is the DNP address to which all unsolicited responses are sent. The IP address to which
Range: NONE, COM2 - RS485, FRONT PANEL - RS232,
NETWORK - TCP, NETWORK - UDP
Range: NONE, COM2 - RS485, FRONT PANEL - RS232,
NETWORK - TCP
setting is set to "Network - TCP," the channel 1(2) DNP
Range: standard IP address

Range: standard IP address
DNP VOLTAGE SCALE FACTOR
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
SETTINGS  PRODUCT SETUP
DNP
setting is set to "1000,"