GE N60 Instruction Manual page 284

FLEXLOGIC
Six identical summators are available in each N60 device.
Each summator has six inputs and a scaling factor is provided for each input. The scaling factors can be set to +1 and –1,
allowing straight addition and subtraction of the inputs. A FlexLogic operand provided for each input can dynamically
include/exclude the input from calculations.
The summator performs the following operation:
where
X represents the programmed input of summator N (determined by the
S represents the programmed scale of summator N (determined by the
P represents the programmed position of summator N (determined by the
The resulting Y value can be set as absolute or signed, allowing switching between the signed and absolute values of the
summator.
A user-programmable threshold is available to compare the Y value with a constant when driving the output operand:
5
where
Op is an output FlexLogic operand (for example,
D is the user-programmable threshold (for example,
Y is the operating value derived earlier (for example,
The Y value becomes a FlexAnalog parameter itself. As such, it can be used by other summators, FlexElements, and user-
programmable displays.
The settings for summator 1 are described as follows. The descriptions apply to all six summators.
SUMMATOR 1 FUNCTION
SUMMATOR 1 INPUT MODE
negative) of the input data summation remains intact. When set to "Absolute," the absolute value of the summation is used
as the output value.
SUMMATOR 1 HOLD
active (on).
SUMMATOR 1 PICKUP
FlexLogic operand is activated (set to on).
SUMMATOR 1 OP
SUMMATOR 1 HYSTERESIS
value, the
HYSTERESIS
"1.000" and the
SUMMATOR 1 HYSTERESIS
resultant output value falls below 0.970.
SUMMATOR 1 UNITS
SUMMATOR 1 PU BASE
N60 features, such as FlexElements. This value is used to normalize the
change it to a per-unit quantity). See the FlexElements section for details on per-unit base values.
SUMMATOR 1 INPUT1(6)
SUMMATOR 1 SCALE1(6)
evaluated.
5-168
SUMMATOR 1 POS2:

Off
SUMMATOR 1 POS6:

Off
SUMMATOR 1 EVENTS:

Disabled
Y = P S
1
 
Op Y D
— When set to "Enabled," this setting allows summator functionality.
— Determines how the output data is formatted. When set to "Signed," the sign (positive/
— The output value to the summator is frozen when the FlexLogic operand assigned to this setting is
— When the output value of the summator is greater than the value assigned to this setting, the
— When the output value of the summator falls below the
FlexLogic operand is deactivated (set to off). For example, if the
SUMMATOR 1 OP
is "3.0%", then the
— Creates a character label for the summator output value display.
— Defines the per-unit base factor when using the
— These settings select the FlexAnalog quantity to use as a summator input.
— These settings apply a scale factor to their corresponding FlexAnalog input quantity as it is
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
Range: FlexLogic operand

Range: FlexLogic operand
Range: Disabled, Enabled
 P
X + P S X + + S X
1 1 2 2 2 6 6 6
SUMMATOR N INPUT1(6)
SUMMATOR N SCALE 1(6)
SUMMATOR N POS1(6)
   abs Y   D 
> or Op >
SUMMATOR 1 OP)
)
SUMMATOR 1 PICKUP
)
SUMMATOR 1 OUTPUT
FlexLogic operand is set to off when the
SUMMATOR 1 OP
SUMMATOR 1 OUTPUT
SUMMATOR 1 OUTPUT
CHAPTER 5: SETTINGS
settings)
settings)
settings)
SUMMATOR 1 PICKUP – SUMMATOR 1
SUMMATOR 1 PICKUP
FlexAnalog quantity in other
FlexAnalog quantity (that is,
Eq. 5-8
Eq. 5-9
is