GE Multilin 850 Instruction Manual page 545

CHAPTER 4: SETPOINTS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
TYPE SYNTAX
Logic gate NOT
OR(2)↓ OR(16)
AND(2)↓ AND(16)
NOR(2)↓ NOR(16)
NAND(2)↓ NAND(16) 2 input NAND gate↓ 16
XOR(2)
LATCH (S,R)
Timer TIMER 1↓ TIMER 32 Timer set with
Assign virtual output = Virt Op 1↓ = Virt
Op 32
The characteristics of the logic gates are tabulated below, and the operators available in
FlexLogic™ are listed in the FlexLogic™ operators table.
Table 4-41: FlexLogic Gate Characteristics
GATES NUMBER OF INPUTS
NOT 1
OR 2 to 16
AND 2 to 16
NOR 2 to 16
NAND 2 to 16
XOR 2
FLEXLOGIC RULES
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 (for example, "TIMER 1") or Virtual Output assignment (for example,
" = Virt Op 1") may only be used once. If this rule is broken, a syntax error will be
declared.
DESCRIPTION NOTES
Logical NOT Operates on the previous
parameter.
2 input OR gate↓ 16 Operates on the 2
input OR gate previous parameters.
↓Operates on the 16
previous parameters.
2 input AND gate↓ 16 Operates on the 2
input AND gate previous parameters.
↓Operates on the 16
previous parameters.
2 input NOR gate↓ 16 Operates on the 2
input NOR gate previous parameters.
↓Operates on the 16
previous parameters.
Operates on the 2
input NAND gate previous parameters.
↓Operates on the 16
previous parameters.
2 input Exclusive OR gate Operates on the 2
previous parameters.
Latch (set, reset): reset- The parameter preceding
dominant LATCH(S,R) is the reset
input. The parameter
preceding the reset input
is the set input.
The timer is started by
FlexLogic™ timer 1 the preceding parameter.
settings. ↓ Timer set with
The output of the timer is
FlexLogic™ timer 32 TIMER #.
settings.
Assigns previous The virtual output is set
FlexLogic™ operand to by the preceding
virtual output 1.↓ Assigns parameter
previous FlexLogic™
operand to virtual output
96.
OUTPUT IS '1' (= ON) IF...
input is '0'
any input is '1'
all inputs are '1'
all inputs are '0'
any input is '0'
only one input is '1'
FLEXLOGIC
4–413