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5 SETTINGS
The B90 supports the Distributed Network Protocol (DNP) version 3.0. The B90 can be used as a DNP slave device con-
nected to multiple DNP masters (usually an RTU or a SCADA master station). Since the B90 maintains two sets of DNP
data change buffers and connection information, two DNP masters can actively communicate with the B90 at one time.
The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the IEC 60870-5-104 FUNCTION
setting is set to "Enabled", the DNP protocol is not operational. When this setting is changed it does not become
active until power to the relay has been cycled (off-to-on).
NOTE
The DNP Channels sub-menu is shown below.
PATH: SETTINGS
PRODUCT SETUP
DNP CHANNELS
MESSAGE
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 B90 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 B90 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 B90 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 B90 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-
GE Multilin
COMMUNICATIONS
DNP CHANNEL 1 PORT:
NETWORK
DNP CHANNEL 2 PORT:
COM2 - RS485
settings select the communications port assigned to the DNP protocol
DNP CHANNEL 2 PORT
settings can force the B90 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 B90 waits for a DNP master to confirm an unsolicited
setting determines the number of times the B90 retransmits an unsolic-
settings determine when to trigger unsolicited responses containing analog input data. These
B90 Low Impedance Bus Differential System
DNP PROTOCOL
DNP CHANNELS
Range: NONE, COM2 - RS485,
FRONT PANEL - RS232, NETWORK - TCP,
NETWORK - UDP
Range: NONE, COM2 - RS485,
FRONT PANEL - RS232, NETWORK - TCP,
NETWORK - UDP
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
5.2 PRODUCT SETUP
5
DNP UNSOL
setting is set to "1000",
5-23
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