GE C70 Instruction Manual page 163

5 SETTINGS
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 solicited
RESPONSE DEST ADDRESS
responses are sent is determined by the C70 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 C70 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 C70 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 C70 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 C70 when any current values change by 15 A, the
should be 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 C70, the default deadbands will be in effect.
The C70 relay does not support energy metering. As such, the
settings are not applicable.
DEFAULT DEADBAND
NOTE
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.
Check the "DNP Points Lists" C70 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 UR Ethernet port employed to access the C70
"Main Menu", then by selecting the "Device Information Menu" > "DNP Points Lists" menu item.
NOTE
The
DNP OBJECT 1 DEFAULT VARIATION
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 DNP
appendix.
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 C70 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 C70 can be configured to sup-
port paired control points, with each paired control point operating two virtual inputs. The
setting allows configuration of from 0 to 32 binary output paired controls. Points not configured as paired operate on
POINTS
a one-to-one basis.
The
DNP TCP CONNECTION TIMEOUT
there is no data traffic on a DNP TCP connection for greater than the time specified by this setting, the connection will be
aborted by the C70. This frees up the connection to be re-used by a client.
Relay power must be re-cycled after changing the
effect.
NOTE
GE Multilin
should be "Disabled" for RS485 applications since there is no collision avoidance
sets the time the C70 waits for a DNP master to confirm an unsolicited
setting determines the number of times the C70 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 C70.
setting determines the size, in bytes, at which message fragmentation occurs. Large
to
DNP OBJECT 32 DEFAULT VARIATION
setting specifies a time delay for the detection of dead network TCP connections. If
C70 Capacitor Bank Protection and Control System
DNP VOLTAGE SCALE FACTOR
DNP CURRENT DEFAULT DEADBAND
DNP ENERGY SCALE FACTOR
settings allow the user to select the DNP
DNP TCP CONNECTION TIMEOUT
5.2 PRODUCT SETUP
DNP UNSOL
setting is set to "1000",
setting
and
DNP ENERGY
DNP NUMBER OF PAIRED CONTROL
setting for the changes to take
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