5-180
N60 Network Stability and Synchrophasor Measurement System
GE Multilin
5.7 INPUTS/OUTPUTS
5 SETTINGS
5
•
DIRECT ANALOG 1 DEFAULT
: This setting specifies the value of direct analog input 1 when the associated direct
device is offline and the
DIRECT ANALOG 1 DEFAULT MODE
is set to “Default Value”. When the associated direct device is
offline and the default mode is set to “Last Known”, the value of direct analog input 1 remains at the last received value.
This value is stored as an IEEE 754 / IEC 60559 floating-point number. Because of the large range for this setting, not
all values can be stored – some values may be rounded to the closest possible floating point number.
•
DIRECT ANALOG 1 UNITS
: This setting provides a four-character string that is used in the direct analog input 1 actual
values display.
•
DIRECT ANALOG 1 PU
: This setting defines the per-unit base factor when using the
DIRECT ANALOG INPUT 1 ACTUAL
FlexAnalog™ value in other N60 features, such as FlexElements™. This value is used to normalize the direct analog
input 1 FlexAnalog™ quantity to its per-unit base. Refer to the
FlexElements™
section for additional details on per-unit
base values.
d) APPLICATION EXAMPLE
Direct analog input FlexAnalog parameters (the
DIR ANALOG INPUT 1
to
DIR ANALOG INPUT 32
values) are available for use
in other N60 functions that use FlexAnalog parameters.
The
DIR ANA 1 INTEGRITY
to
DIR ANA 32 INTEGRITY
,
DIR ANA 1 DEADBAND
to
DIR ANA 32 DEADBAND
, and
DIR ANA 1
FORCED
to
DIR ANA 32 FORCED
FlexLogic™ operands are provided to indicate the most recent trigger condition: Only one
operand can be active (logic 1) at any time. If a direct device is offline, all of the associated trigger operands will be inactive
(logic 0).
The following figure illustrates the operation of the direct analogs feature.
In this example, UR-1 is configured to use four out of its 32 analog channels. These four values are selected from two
sources. UR-2 is configured to receive two out of the four analog values sent, and UR-3 is set to receive three values. Note
that
SRC 2 FREQ
is effectively being received at both UR-2 and UR-3.
Figure 5–86: DIRECT ANALOGS SAMPLE APPLICATION
UR-2
UR-1
Pool of
FlexAnalog
parameters
Pool of
FlexAnalog
parameters
SRC1 P
SRC1 PF
SRC2 FREQ
SRC1 V1 Mag
Analog Out 1
Analog Out 2
Analog Out 3
Analog Out 4
Analog In 7
Analog In 3
Remote Analog 7
UR-3
Pool of
FlexAnalog
parameters
Analog In 2
Analog In 3
Remote Analog 2
Analog In 9
Remote Analog 9
TX
RX
TX
RX
UR-1 is configured to send four
analog values as outputs 1, 2, 3,
and 4, respectively.
UR-2 is configured to receive
and
from
UR-1 as direct analog inputs 7
and 3, respectively.
SRC1 P
SRC2 FREQ
UR-3 is configured to receive
,
, and
from UR-1 as
direct analog inputs 2, 3, and 9,
respectively
SRC1 PF SRC2 FREQ
SRC1 V1 Mag
Remote Analog 3
Remote Analog 3
847007A1.CDR