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CHAPTER 5: SETTINGS PRODUCT SETUP
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL 5-37
5
The
DNP TCP/UDP PORT NUMBER
setting is for normal DNP operation. To close the port, set the port number to 0. The change
takes effect when the C30 is restarted.
The
DNP UNSOL RESPONSE FUNCTION
is set to “Disabled” for RS485 applications since there is no collision avoidance
mechanism. The
DNP UNSOL RESPONSE TIMEOUT
sets the time the C30 waits for a DNP master to confirm an unsolicited
response. The
DNP UNSOL RESPONSE MAX RETRIES
setting determines the number of times the C30 retransmits an
unsolicited response without receiving confirmation from the master; a value of “255” allows infinite re-tries. The
DNP
UNSOL RESPONSE DEST ADDRESS
is the DNP address to which all unsolicited responses are sent. The IP address to which
solicited responses are sent is determined by the C30 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 C30 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
DNP VOLTAGE SCALE FACTOR
setting is set to “1000,”
all DNP analog input points that are voltages are returned with values 1000 times smaller (for example, a value of 72000 V
on the C30 is returned as 72). These settings are useful when analog input values must be adjusted to fit within certain
ranges in DNP masters. Note that a scale factor of 0.1 is equivalent to a multiplier of 10 (that is, the value is 10 times larger).
The
DNP DEFAULT DEADBAND
settings determine when to trigger unsolicited responses containing analog input data. These
settings group the C30 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
unsolicited responses from the C30 when any current values change by 15 A, the
DNP CURRENT DEFAULT DEADBAND
setting
is set to “15.” Note that these settings are the deadband default values. DNP object 34 points can be used to change
deadband values, from the default, for each individual DNP analog input point. Whenever power is removed and re-
applied to the C30, the default deadbands are in effect.
The
DNP TIME SYNC IIN PERIOD
setting determines how often the Need Time Internal Indication (IIN) bit is set by the C30.
Changing this time allows the DNP master to send time synchronization commands more or less often, as required.
The
DNP MESSAGE FRAGMENT SIZE
setting determines the size, in bytes, at which message fragmentation occurs. Large
fragment sizes allow for more efficient throughput; smaller fragment sizes cause more application layer confirmations to
be necessary, which provides more robust data transfer over noisy communication channels.
The
DNP OBJECT 1 DEFAULT VARIATION
to
DNP OBJECT 32 DEFAULT VARIATION
settings select the DNP default variation
number for object types 1, 2, 20, 21, 22, 23, 30, and 32. The default variation refers to the variation response when variation
0 is requested and/or in class 0, 1, 2, or 3 scans. See the DNP Implementation section in the UR Family Communications
Guide.
The DNP binary outputs typically map one-to-one to IED data points. That is, each DNP binary output controls a single
physical or virtual control point in an IED. In the C30 relay, DNP binary outputs are mapped to virtual inputs. However, some
legacy DNP implementations use a mapping of one DNP binary output to two physical or virtual control points to support
the concept of trip/close (for circuit breakers) or raise/lower (for tap changers) using a single control point. That is, the DNP
master can operate a single point for both trip and close, or raise and lower, operations. The C30 can be configured to
support paired control points, with each paired control point operating two virtual inputs. The
DNP NUMBER OF PAIRED
CONTROL POINTS
setting allows configuration of 0 to 32 binary output paired controls. Points not configured as paired
operate on a one-to-one basis.

CLIENT ADDRESS 5:
0.0.0.0
Range: standard IP address
The C30 relay does not support power metering. As such, the
DNP POWER SCALE FACTOR and DNP POWER DEFAULT
DEADBAND
settings are not applicable.
The C30 relay does not support energy metering. As such, the
DNP ENERGY SCALE FACTOR
and
DNP ENERGY DEFAULT
DEADBAND
settings are not applicable.
Check the “DNP Points Lists” C30 web page to view the analog inputs and/or binary inputs points lists. This page
can be viewed with a web browser by entering the IP address of the C30 Ethernet port employed to access the C30
Main Menu, then by clicking the
Device Information Menu item, then the DNP Points Lists item.