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5.4 FLEXLOGIC™
Table 5–9: FLEXLOGIC™ OPERATORS
TYPE
SYNTAX
Editor
INSERT
DELETE
End
END
One-shot
POSITIVE ONE SHOT One shot that responds to a positive going edge.
NEGATIVE ONE
SHOT
DUAL ONE SHOT
Logic
NOT
gate
OR(2)
↓
OR(16)
AND(2)
↓
AND(16)
NOR(2)
↓
NOR(16)
NAND(2)
↓
NAND(16)
XOR(2)
5
LATCH (S,R)
Timer
TIMER 1
↓
TIMER 32
Assign
= Virt Op 1
↓
virtual
output
= Virt Op 96
When forming a FlexLogic™ equation, the sequence in the linear array of parameters must follow these general rules:
1.
Operands must precede the operator which uses the operands as inputs.
2.
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 an operator to a virtual output terminates the equation.
4.
A timer operator (e.g. "TIMER 1") or virtual output assignment (e.g. " = Virt Op 1") may only be used once. If this rule is
broken, a syntax error will be declared.
Each equation is evaluated in the order in which the parameters have been entered.
FlexLogic™ provides latches which by definition have a memory action, remaining in the set state after the
set input has been asserted. However, they are volatile; i.e. they reset on the re-application of control
power.
NOTE
When making changes to settings, all FlexLogic™ equations are re-compiled whenever any new setting
value is entered, so all latches are automatically reset. If it is necessary to re-initialize FlexLogic™ during
testing, for example, it is suggested to power the unit down and then back up.
5-84
DESCRIPTION
Insert a parameter in an equation list.
Delete a parameter from an equation list.
The first END encountered signifies the last entry in
the list of processed FlexLogic™ parameters.
One shot that responds to a negative going edge.
One shot that responds to both the positive and
negative going edges.
Logical NOT
2 input OR gate
↓
16 input OR gate
2 input AND gate
↓
16 input AND gate
2 input NOR gate
↓
16 input NOR gate
2 input NAND gate
↓
16 input NAND gate
2 input Exclusive OR gate
Latch (set, reset): reset-dominant
Timer set with FlexLogic™ timer 1 settings.
↓
Timer set with FlexLogic™ timer 32 settings.
Assigns previous FlexLogic™ operand to virtual
output 1.
↓
Assigns previous FlexLogic™ operand to virtual
output 96.
F60 Feeder Protection System
5 SETTINGS
NOTES
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 is
a maximum of 64 'one shots'.
Operates on the previous parameter.
Operates on the 2 previous parameters.
↓
Operates on the 16 previous parameters.
Operates on the 2 previous parameters.
↓
Operates on the 16 previous parameters.
Operates on the 2 previous parameters.
↓
Operates on the 16 previous parameters.
Operates on the 2 previous parameters.
↓
Operates on the 16 previous parameters.
Operates on the 2 previous 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
5.4.2 FLEXLOGIC™ RULES
5.4.3 FLEXLOGIC™ EVALUATION
GE Multilin
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