Protection Flexlogic™ Gates And Operators - GE D90 Plus Instruction Manual

PROTECTION FLEXLOGIC™
Protection FlexLogic™ gates and operators
390
Type State
Element Pickup
(digital)
Dropout
Operate
Fixed On
Off
Remote On
input
Virtual On
input
Virtual On
output
The characteristics of logic gates used in protection FlexLogic™ equations are tabulated
below.
Table 23: Protection FlexLogic™ gate characteristics
Gate Inputs
NOT 1
OR 2 to 16
AND 2 to 16
NOR 2 to 16
NAND 2 to 16
XOR 2
The following operators are available for use in protection FlexLogic™ equations.
Table 24: Protection FlexLogic™ operators
Type Syntax Description
Editor INSERT Insert a parameter in the equation
list.
DELETE Delete a parameter from an
equation list.
End END The first END operator signifies the
last entry in the FlexLogic™
equation.
One POSITIVE ONE One shot that corresponds to a
shots SHOT positive-going edge.
NEGATIVE ONE One shot that corresponds to a
SHOT negative-going edge.
DUAL ONE SHOT One shot that responds to both the
positive and negative-going edges.
Example Characteristics (input is logic 1 or "on" if...)
The output operand is at logic 1.
DIG ELEM 1 PKP
This operand is the logical inverse of the
DIG ELEM 1 DPO
pickup operand.
The input operand has been at logic 1 for the
DIG ELEM 1 OP
programmed pickup delay time, or has been
at logic 1 for this period and is now at logic 0
but the reset timer has not finished timing.
Logic 1.
ON
Logic 0.
OFF
The remote input is presently in the on state.
REMOTE IN 1 ON
The virtual input is presently in the on state.
VIRT IP 1 ON
The virtual input is presently in the on state.
VIRT OP 1 ON
Output is logic 1 if...
the input is logic 0
any input is logic 1
all inputs are logic 1
all inputs are logic 0
any input is logic 0
only one input is logic 1
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION
Operation
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A one shot refers to a single input
gate that generates a pulse in
response to an edge on the input.
The output from a one shot is true
(positive) for only one pass through
the FlexLogic™ equation. There are
a maximum of 64 one shots.