GE UR Series L90 Instruction Manual page 169

5 SETTINGS
The and
DNP CHANNEL 1 PORT
for each channel. Once DNP is assigned to a serial port, the Modbus protocol is disabled on that port. 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 on channel 1 only. Refer to Appendix E for additional information on the
DNP protocol.
Changes to the DNP CHANNEL 1 PORT and DNP CHANNEL 2 PORT settings take effect only after power has
been cycled to the relay.
NOTE
The
DNP NETWORK CLIENT ADDRESS
settings in this sub-menu are shown below.

PATH: SETTINGS PRODUCT SETUP
 DNP NETWORK
 CLIENT ADDRESSES
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The
DNP UNSOL RESPONSE FUNCTION
mechanism. The
DNP UNSOL RESPONSE TIMEOUT
response. The
DNP UNSOL RESPONSE MAX RETRIES
ited response without receiving confirmation from the master; a value of "255" allows infinite re-tries. The
is the DNP address to which all unsolicited responses are sent. The IP address to which unsolic-
RESPONSE DEST ADDRESS
ited responses are sent is determined by the L90 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 L90 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 will be returned with values 1000 times smaller (for example, a value of 72000
V on the L90 will be returned as 72). These settings are useful when analog input values must be adjusted to fit within cer-
tain ranges in DNP masters. Note that a scale factor of 0.1 is equivalent to a multiplier of 10 (that is, the value will be 10
times larger).
The
DNP DEFAULT DEADBAND
settings group the L90 analog input data into the following types: current, voltage, power, energy, power factor, and other.
Each setting represents the default deadband value for all analog input points of that type. For example, to trigger unsolic-
ited responses from the L90 when any current values change by 15 A, the
be set to "15". Note that these settings are the deadband default values. DNP object 34 points can be used to change dead-
band values, from the default, for each individual DNP analog input point. Whenever power is removed and re-applied to
the L90, the default deadbands will be in effect.
The
DNP TIME SYNC IIN PERIOD
Changing this time allows the DNP master to send time synchronization commands more or less often, as required.
The
DNP MESSAGE FRAGMENT SIZE
fragment sizes allow for more efficient throughput; smaller fragment sizes cause more application layer confirmations to be
necessary which can provide for more robust data transfer over noisy communication channels.
When the DNP data points (analog inputs and/or binary inputs) are configured for Ethernet-enabled relays, check
the "DNP Points Lists" L90 web page to view the points lists. This page can be viewed with a web browser by enter-
NOTE ing the L90 IP address to access the L90 "Main Menu", then by selecting the "Device Information Menu" > "DNP
Points Lists" menu item.
GE Multilin
settings select the communications port assigned to the DNP protocol
DNP CHANNEL 2 PORT
settings can force the L90 to respond to a maximum of five specific DNP masters. The
 
COMMUNICATIONS
CLIENT ADDRESS 1:
0.0.0.0
CLIENT ADDRESS 2:
0.0.0.0
CLIENT ADDRESS 3:
0.0.0.0
CLIENT ADDRESS 4:
0.0.0.0
CLIENT ADDRESS 5:
0.0.0.0
should be "Disabled" for RS485 applications since there is no collision avoidance
sets the time the L90 waits for a DNP master to confirm an unsolicited
setting determines the number of times the L90 retransmits an unsolic-
settings determine when to trigger unsolicited responses containing analog input data. These
setting determines how often the Need Time Internal Indication (IIN) bit is set by the L90.
setting determines the size, in bytes, at which message fragmentation occurs. Large
L90 Line Current Differential System

DNP PROTOCOL DNP NETWORK CLIENT ADDRESSES
Range: standard IP address
Range: standard IP address
Range: standard IP address
Range: standard IP address
Range: standard IP address
DNP VOLTAGE SCALE FACTOR
DNP CURRENT DEFAULT DEADBAND
5.2 PRODUCT SETUP
5
DNP UNSOL
setting is set to "1000",
setting should
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