Flexlogic Rules; Protection Flexlogic Equation Editor - GE D90 Plus Instruction Manual

PROTECTION FLEXLOGIC

FlexLogic rules

Protection FlexLogic equation editor

406
Type Syntax Description
Logic NOT A logical NOT gate
gates
AND(n) An n-input AND gate, n = 1 to 16
OR(n) An n-input OR gate, n = 1 to 16
NOR(n) An n-input NOR gate, n = 1 to 16
NAND(n) An n-input NAND gate, n = 1 to 16
XOR(2) A two-input exclusive OR gate
LATCH(S,R) Latch (set, reset), reset-dominant
Timers TIMER n Timer set with the settings
programmed for FlexLogic timer n,
where n = 1 to 32
Assign VIRT OP n Assigns the previous FlexLogic
outputs parameter to virtual output n,
where n = 1 to 96
When forming a protection FlexLogic equation, the sequence in the linear array of
parameters must follow these general rules.
1. Logic operands must precede the logic operator that uses the operands as inputs.
2. Logic operators have only one output. The output of an operator must be used to
create a virtual output if it is to be used as an input to two or more operators.
3. Assigning the output of a logic operator to a virtual output terminates the equation.
4. A timer operator (for example
1) can be used only once. If this rule is broken, a syntax error is declared.
Op
A protection FlexLogic equation can contain up to 512 entries, including the
If a disabled element is selected as a FlexLogic entry, the associated state flag is never
asserted (set to logic 1).
Select the Settings > Protection > Protection FlexLogic > FlexLogic Equation Editor
menu to open the protection FlexLogic equation editor window.
1) or virtual output assignment (for example,
TIMER
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION
Operation
Operates on the previous
parameter
Operates on the previous n
parameters
Operates on the previous n
parameters
Operates on the previous n
parameters
Operates on the previous n
parameters
Operates on the previous 2
parameters
Operates on the previous 2
parameters. The parameter
preceding LATCH(S,R) is the reset
input. The parameter preceding the
reset input is the set input.
The timer is started by the
preceding parameter. The output of
the timer is TIMER #.
The virtual output is set by the
preceding parameter
operator.
END
= Virt